diff --git a/src/Geopilot.Api/Program.cs b/src/Geopilot.Api/Program.cs
index 825bf0d0..8f3720e8 100644
--- a/src/Geopilot.Api/Program.cs
+++ b/src/Geopilot.Api/Program.cs
@@ -212,6 +212,8 @@
 app.UseDefaultFiles();
 app.UseStaticFiles();
 
+app.UseRouting();
+
 if (app.Environment.IsDevelopment())
 {
     app.UseCors("All");
@@ -264,4 +266,6 @@
 
 app.MapReverseProxy();
 
+app.MapFallbackToFile("index.html");
+
 app.Run();
diff --git a/src/Geopilot.Frontend/cypress/e2e/app.cy.js b/src/Geopilot.Frontend/cypress/e2e/app.cy.js
index c8ff4362..280f0fe3 100644
--- a/src/Geopilot.Frontend/cypress/e2e/app.cy.js
+++ b/src/Geopilot.Frontend/cypress/e2e/app.cy.js
@@ -14,6 +14,7 @@ describe("General app tests", () => {
   it("shows no login button if auth settings could not be loaded", () => {
     loadWithoutAuth();
     cy.get('[data-cy="login-button"]').should("not.exist");
+    cy.get('[data-cy="delivery"]').should("exist");
   });
 
   it.skip("registers new users and logs them in", () => {
@@ -52,23 +53,30 @@ describe("General app tests", () => {
     selectAdminNavItem("mandates");
     selectAdminNavItem("organisations");
     selectAdminNavItem("delivery-overview");
+    cy.reload();
+    isSelectedNavItem("admin-delivery-overview-nav", "admin-navigation");
+    cy.location().should(location => {
+      expect(location.pathname).to.eq("/admin/delivery-overview");
+    });
   });
 
   it("updates the language when the user selects a different language", () => {
-    cy.visit("/");
+    loginAsAdmin();
+    openTool("admin");
+
     cy.contains("EN");
-    cy.contains("Log In");
+    cy.contains("Rows per page");
 
     selectLanguage("de");
     cy.contains("DE");
-    cy.contains("Anmelden");
+    cy.contains("Zeilen pro Seite");
 
     selectLanguage("fr");
     cy.contains("FR");
-    cy.contains("Se connecter");
+    cy.contains("Lignes par page");
 
     selectLanguage("it");
     cy.contains("IT");
-    cy.contains("Accedi");
+    cy.contains("Righe per pagina");
   });
 });
diff --git a/src/Geopilot.Frontend/cypress/e2e/helpers/appHelpers.js b/src/Geopilot.Frontend/cypress/e2e/helpers/appHelpers.js
index 7d0ab576..b85f7ce4 100644
--- a/src/Geopilot.Frontend/cypress/e2e/helpers/appHelpers.js
+++ b/src/Geopilot.Frontend/cypress/e2e/helpers/appHelpers.js
@@ -119,9 +119,12 @@ export const createBaseSelector = parent => {
  * Opens the tool navigation. Requires the user to be logged in.
  */
 export const openToolMenu = () => {
-  if (!cy.get('[data-cy="tool-navigation"]').should("be.visible")) {
-    cy.get('[data-cy="loggedInUser-button"]').click();
-  }
+  cy.get("body").then($body => {
+    const elementExists = $body.find('[data-cy="tool-navigation"]').length > 0;
+    if (!elementExists) {
+      cy.get('[data-cy="loggedInUser-button"]').click();
+    }
+  });
 };
 
 /**
diff --git a/src/Geopilot.Frontend/src/app.tsx b/src/Geopilot.Frontend/src/app.tsx
index 02b64fe3..09bb9517 100644
--- a/src/Geopilot.Frontend/src/app.tsx
+++ b/src/Geopilot.Frontend/src/app.tsx
@@ -15,10 +15,11 @@ import { PrivacyPolicy } from "./pages/footer/privacyPolicy.tsx";
 import { About } from "./pages/footer/about.tsx";
 import { Imprint } from "./pages/footer/imprint.tsx";
 import { DeliveryProvider } from "./pages/delivery/deliveryContext.tsx";
+import { CircularProgress } from "@mui/material";
 
 export const App: FC = () => {
   const [isSubMenuOpen, setIsSubMenuOpen] = useState(false);
-  const { isAdmin } = useGeopilotAuth();
+  const { isLoading, isAdmin } = useGeopilotAuth();
 
   return (
     <AppBox>
@@ -30,34 +31,38 @@ export const App: FC = () => {
         />
         <LayoutBox>
           <PageContentBox>
-            <Routes>
-              <Route
-                path="/"
-                element={
-                  <DeliveryProvider>
-                    <Delivery />
-                  </DeliveryProvider>
-                }
-              />
-              {isAdmin ? (
-                <>
-                  <Route path="admin" element={<Navigate to="/admin/delivery-overview" replace />} />
-                  <Route
-                    path="admin"
-                    element={<Admin isSubMenuOpen={isSubMenuOpen} setIsSubMenuOpen={setIsSubMenuOpen} />}>
-                    <Route path="delivery-overview" element={<DeliveryOverview />} />
-                    <Route path="users" element={<Users />} />
-                    <Route path="mandates" element={<Mandates />} />
-                    <Route path="organisations" element={<Organisations />} />
-                  </Route>
-                </>
-              ) : (
-                <Route path="admin/*" element={<Navigate to="/" replace />} />
-              )}
-              <Route path="/imprint" element={<Imprint />} />
-              <Route path="/privacy-policy" element={<PrivacyPolicy />} />
-              <Route path="/about" element={<About />} />
-            </Routes>
+            {isLoading ? (
+              <CircularProgress />
+            ) : (
+              <Routes>
+                <Route
+                  path="/"
+                  element={
+                    <DeliveryProvider>
+                      <Delivery />
+                    </DeliveryProvider>
+                  }
+                />
+                {isAdmin ? (
+                  <>
+                    <Route path="admin" element={<Navigate to="/admin/delivery-overview" replace />} />
+                    <Route
+                      path="admin"
+                      element={<Admin isSubMenuOpen={isSubMenuOpen} setIsSubMenuOpen={setIsSubMenuOpen} />}>
+                      <Route path="delivery-overview" element={<DeliveryOverview />} />
+                      <Route path="users" element={<Users />} />
+                      <Route path="mandates" element={<Mandates />} />
+                      <Route path="organisations" element={<Organisations />} />
+                    </Route>
+                  </>
+                ) : (
+                  <Route path="admin/*" element={<Navigate to="/" replace />} />
+                )}
+                <Route path="/imprint" element={<Imprint />} />
+                <Route path="/privacy-policy" element={<PrivacyPolicy />} />
+                <Route path="/about" element={<About />} />
+              </Routes>
+            )}
           </PageContentBox>
           <Footer />
         </LayoutBox>
diff --git a/src/Geopilot.Frontend/src/auth/authInterfaces.ts b/src/Geopilot.Frontend/src/auth/authInterfaces.ts
index 9d81d239..f6273455 100644
--- a/src/Geopilot.Frontend/src/auth/authInterfaces.ts
+++ b/src/Geopilot.Frontend/src/auth/authInterfaces.ts
@@ -2,8 +2,9 @@ import { PropsWithChildren } from "react";
 import { User } from "../api/apiInterfaces.ts";
 
 export interface GeopilotAuthContextInterface {
-  enabled: boolean;
-  user: User | undefined;
+  authEnabled: boolean;
+  isLoading: boolean;
+  user: User | null | undefined;
   isAdmin: boolean;
   login: () => void;
   logout: () => void;
diff --git a/src/Geopilot.Frontend/src/auth/geopilotAuthComponent.tsx b/src/Geopilot.Frontend/src/auth/geopilotAuthComponent.tsx
index 4ddfaa26..84a85b11 100644
--- a/src/Geopilot.Frontend/src/auth/geopilotAuthComponent.tsx
+++ b/src/Geopilot.Frontend/src/auth/geopilotAuthComponent.tsx
@@ -3,12 +3,13 @@ import { ApiAuthConfigurationProvider } from "./apiAuthConfigurationContext";
 import { GeopilotAuthContextInterface } from "./authInterfaces";
 import { OidcContainerProvider } from "./oidcContainerContext";
 import { UserProvider } from "./userContext";
-import { useUser } from ".";
+import { useApiAuthConfiguration, useUser } from ".";
 import { useAuth } from "react-oidc-context";
 import { CookieSynchronizer } from "./cookieSynchronizer";
 
 export const GeopilotAuthContext = createContext<GeopilotAuthContextInterface>({
-  enabled: false,
+  authEnabled: false,
+  isLoading: false,
   user: undefined,
   isAdmin: false,
   login: () => {
@@ -35,8 +36,11 @@ export const GeopilotAuthProvider: FC<PropsWithChildren> = ({ children }) => {
 const GeopilotAuthContextMerger: FC<PropsWithChildren> = ({ children }) => {
   const auth = useAuth();
   const user = useUser();
+  const apiSetting = useApiAuthConfiguration();
+
+  const authEnabled = !!(apiSetting && apiSetting.clientId && apiSetting.authority);
+  const isLoading = !((!!apiSetting && !authEnabled) || user !== undefined);
 
-  const enabled = auth !== undefined && !auth.isLoading;
   const getLoginFunction = () => {
     if (!auth) return () => {};
     if (window.Cypress) {
@@ -49,9 +53,10 @@ const GeopilotAuthContextMerger: FC<PropsWithChildren> = ({ children }) => {
   return (
     <GeopilotAuthContext.Provider
       value={{
-        enabled: enabled,
+        authEnabled: authEnabled,
+        isLoading: isLoading,
         user: user,
-        isAdmin: enabled && !!user?.isAdmin,
+        isAdmin: !!user?.isAdmin,
         login: getLoginFunction(),
         logout: auth !== undefined ? auth.signoutRedirect : () => {},
       }}>
diff --git a/src/Geopilot.Frontend/src/auth/userContext.tsx b/src/Geopilot.Frontend/src/auth/userContext.tsx
index 263640d4..704ee459 100644
--- a/src/Geopilot.Frontend/src/auth/userContext.tsx
+++ b/src/Geopilot.Frontend/src/auth/userContext.tsx
@@ -3,10 +3,10 @@ import { User } from "../api/apiInterfaces";
 import { useAuth } from "react-oidc-context";
 import { useApi } from "../api";
 
-export const UserContext = createContext<User | undefined>(undefined);
+export const UserContext = createContext<User | null | undefined>(undefined);
 
 export const UserProvider: FC<PropsWithChildren> = ({ children }) => {
-  const [user, setUser] = useState<User>();
+  const [user, setUser] = useState<User | null>();
   const auth = useAuth();
   const { fetchApi } = useApi();
 
@@ -22,10 +22,10 @@ export const UserProvider: FC<PropsWithChildren> = ({ children }) => {
   useEffect(() => {
     if (auth?.isAuthenticated) {
       fetchUserInfo();
-    } else if (!auth?.isLoading) {
-      setUser(undefined);
+    } else if (!!auth && !auth?.isLoading) {
+      setUser(null);
     }
-  }, [auth?.isAuthenticated, auth?.isLoading, fetchUserInfo]);
+  }, [auth, auth?.isAuthenticated, auth?.isLoading, fetchUserInfo]);
 
   return <UserContext.Provider value={user}>{children}</UserContext.Provider>;
 };
diff --git a/src/Geopilot.Frontend/src/components/appSettings/appSettingsContext.tsx b/src/Geopilot.Frontend/src/components/appSettings/appSettingsContext.tsx
index b8ebb135..cd665c79 100644
--- a/src/Geopilot.Frontend/src/components/appSettings/appSettingsContext.tsx
+++ b/src/Geopilot.Frontend/src/components/appSettings/appSettingsContext.tsx
@@ -15,39 +15,41 @@ export const AppSettingsProvider: FC<PropsWithChildren> = ({ children }) => {
   const [termsOfUse, setTermsOfUse] = useState<string | null>();
 
   useEffect(() => {
-    fetchApi<ClientSettings>("client-settings.json")
+    fetchApi<ClientSettings>("/client-settings.json", { responseType: ContentType.Json })
       .then(setClientSettings)
       .catch(() => setClientSettings(null));
-    fetchApi<string>("terms-of-use.md", { responseType: ContentType.Markdown })
+    fetchApi<string>("/terms-of-use.md", { responseType: ContentType.Markdown })
       .then(setTermsOfUse)
       .catch(() => setTermsOfUse(null));
   }, [fetchApi]);
 
   useEffect(() => {
-    const link = document.querySelector("link[rel=icon]");
-    const defaultLink = document.querySelector("link[rel=icon]:not([data-dark-mode])");
-    const darkModeLink = document.querySelector("link[rel=icon][data-dark-mode]");
-    const faviconHref = clientSettings?.application?.favicon;
-    const darkModeFaviconHref = clientSettings?.application?.faviconDark;
+    if (clientSettings) {
+      const link = document.querySelector("link[rel=icon]");
+      const defaultLink = document.querySelector("link[rel=icon]:not([data-dark-mode])");
+      const darkModeLink = document.querySelector("link[rel=icon][data-dark-mode]");
+      const faviconHref = clientSettings?.application?.favicon;
+      const darkModeFaviconHref = clientSettings?.application?.faviconDark;
 
-    if (faviconHref) {
-      link?.setAttribute("href", faviconHref);
-      defaultLink?.setAttribute("href", faviconHref);
-    }
+      if (faviconHref) {
+        link?.setAttribute("href", faviconHref);
+        defaultLink?.setAttribute("href", faviconHref);
+      }
 
-    if (darkModeFaviconHref) {
-      if (darkModeLink) {
-        darkModeLink.setAttribute("href", darkModeFaviconHref);
-      } else {
-        const newDarkModeLink = document.createElement("link");
-        newDarkModeLink.setAttribute("rel", "icon");
-        newDarkModeLink.setAttribute("href", darkModeFaviconHref);
-        newDarkModeLink.setAttribute("media", "(prefers-color-scheme: dark)");
-        newDarkModeLink.setAttribute("data-dark-mode", "true");
-        document.head.appendChild(newDarkModeLink);
+      if (darkModeFaviconHref) {
+        if (darkModeLink) {
+          darkModeLink.setAttribute("href", darkModeFaviconHref);
+        } else {
+          const newDarkModeLink = document.createElement("link");
+          newDarkModeLink.setAttribute("rel", "icon");
+          newDarkModeLink.setAttribute("href", darkModeFaviconHref);
+          newDarkModeLink.setAttribute("media", "(prefers-color-scheme: dark)");
+          newDarkModeLink.setAttribute("data-dark-mode", "true");
+          document.head.appendChild(newDarkModeLink);
+        }
+      } else if (darkModeLink) {
+        darkModeLink.remove();
       }
-    } else if (darkModeLink) {
-      darkModeLink.remove();
     }
   }, [clientSettings]);
 
diff --git a/src/Geopilot.Frontend/src/components/header/header.tsx b/src/Geopilot.Frontend/src/components/header/header.tsx
index 89f488a7..2395c52d 100644
--- a/src/Geopilot.Frontend/src/components/header/header.tsx
+++ b/src/Geopilot.Frontend/src/components/header/header.tsx
@@ -35,7 +35,7 @@ const Header: FC<HeaderProps> = ({ openSubMenu }) => {
   const navigate = useNavigate();
   const location = useLocation();
   const { clientSettings } = useAppSettings();
-  const { user, enabled, isAdmin, login, logout } = useGeopilotAuth();
+  const { user, authEnabled, isAdmin, login, logout } = useGeopilotAuth();
 
   const [userMenuOpen, setUserMenuOpen] = useState<boolean>(false);
 
@@ -116,7 +116,7 @@ const Header: FC<HeaderProps> = ({ openSubMenu }) => {
           </FlexRowBox>
           <FlexRowBox>
             <LanguagePopup />
-            {enabled &&
+            {authEnabled &&
               (user ? (
                 <IconButton
                   sx={{
diff --git a/src/Geopilot.Frontend/src/pages/delivery/delivery.tsx b/src/Geopilot.Frontend/src/pages/delivery/delivery.tsx
index ba6490fe..40b1d41c 100644
--- a/src/Geopilot.Frontend/src/pages/delivery/delivery.tsx
+++ b/src/Geopilot.Frontend/src/pages/delivery/delivery.tsx
@@ -23,7 +23,7 @@ const Delivery = () => {
   const isCompleted = (stepIndex: number) => activeStep > stepIndex;
 
   return (
-    <CenteredBox>
+    <CenteredBox data-cy="delivery">
       <Typography variant="h1">{t("deliveryTitle")}</Typography>
       <DeliveryContainer>
         <Stepper activeStep={activeStep} orientation="vertical">
diff --git a/src/Geopilot.Frontend/src/pages/delivery/deliveryContext.tsx b/src/Geopilot.Frontend/src/pages/delivery/deliveryContext.tsx
index e6eff6d0..773ecbab 100644
--- a/src/Geopilot.Frontend/src/pages/delivery/deliveryContext.tsx
+++ b/src/Geopilot.Frontend/src/pages/delivery/deliveryContext.tsx
@@ -33,7 +33,7 @@ export const DeliveryProvider: FC<PropsWithChildren> = ({ children }) => {
   const [isValidating, setIsValidating] = useState<boolean>(false);
   const [abortControllers, setAbortControllers] = useState<AbortController[]>([]);
   const { fetchApi } = useApi();
-  const { enabled } = useGeopilotAuth();
+  const { authEnabled } = useGeopilotAuth();
   const [steps, setSteps] = useState<Map<DeliveryStepEnum, DeliveryStep>>(
     new Map<DeliveryStepEnum, DeliveryStep>([
       [DeliveryStepEnum.Upload, { label: "upload", content: <DeliveryUpload /> }],
@@ -49,7 +49,7 @@ export const DeliveryProvider: FC<PropsWithChildren> = ({ children }) => {
   );
 
   useEffect(() => {
-    if (enabled) {
+    if (authEnabled) {
       setSteps(prevSteps => {
         const newSteps = new Map(prevSteps);
 
@@ -68,7 +68,7 @@ export const DeliveryProvider: FC<PropsWithChildren> = ({ children }) => {
         return newSteps;
       });
     }
-  }, [enabled]);
+  }, [authEnabled]);
 
   const isActiveStep = (step: DeliveryStepEnum) => {
     const stepKeys = Array.from(steps.keys());
diff --git a/src/Geopilot.Frontend/src/pages/delivery/deliverySubmit.tsx b/src/Geopilot.Frontend/src/pages/delivery/deliverySubmit.tsx
index bbed7327..a792006c 100644
--- a/src/Geopilot.Frontend/src/pages/delivery/deliverySubmit.tsx
+++ b/src/Geopilot.Frontend/src/pages/delivery/deliverySubmit.tsx
@@ -14,7 +14,7 @@ import { useTranslation } from "react-i18next";
 
 export const DeliverySubmit = () => {
   const { t } = useTranslation();
-  const { enabled, user, login } = useGeopilotAuth();
+  const { authEnabled, user, login } = useGeopilotAuth();
   const formMethods = useForm({ mode: "all" });
   const { fetchApi } = useApi();
   const { setStepError, validationResponse, isLoading, submitDelivery, resetDelivery } = useContext(DeliveryContext);
@@ -55,7 +55,7 @@ export const DeliverySubmit = () => {
     submitDelivery(data as DeliverySubmitData);
   };
 
-  return enabled && user ? (
+  return authEnabled && user ? (
     <FormProvider {...formMethods}>
       <form onSubmit={formMethods.handleSubmit(submitForm)}>
         <FlexColumnBox>
diff --git a/src/Geopilot.Frontend/src/pages/footer/about.tsx b/src/Geopilot.Frontend/src/pages/footer/about.tsx
index d6e26226..e897ffc2 100644
--- a/src/Geopilot.Frontend/src/pages/footer/about.tsx
+++ b/src/Geopilot.Frontend/src/pages/footer/about.tsx
@@ -38,9 +38,9 @@ export const About = () => {
   const { hash } = useLocation();
 
   useEffect(() => {
-    fetchApi<string>("info.md", { responseType: ContentType.Markdown }).then(setInfo);
-    fetchApi<PackageList>("license.json", { responseType: ContentType.Json }).then(setLicenseInfo);
-    fetchApi<PackageList>("license.custom.json", { responseType: ContentType.Json }).then(setLicenseInfoCustom);
+    fetchApi<string>("/info.md", { responseType: ContentType.Markdown }).then(setInfo);
+    fetchApi<PackageList>("/license.json", { responseType: ContentType.Json }).then(setLicenseInfo);
+    fetchApi<PackageList>("/license.custom.json", { responseType: ContentType.Json }).then(setLicenseInfoCustom);
     fetchApi<string>("/api/v1/version").then(version => {
       setVersion(version.split("+")[0]);
     });
diff --git a/src/Geopilot.Frontend/src/pages/footer/imprint.tsx b/src/Geopilot.Frontend/src/pages/footer/imprint.tsx
index 6cb6db41..cc1b2b40 100644
--- a/src/Geopilot.Frontend/src/pages/footer/imprint.tsx
+++ b/src/Geopilot.Frontend/src/pages/footer/imprint.tsx
@@ -12,7 +12,7 @@ export const Imprint = () => {
   const { fetchApi } = useApi();
 
   useEffect(() => {
-    fetchApi<string>("imprint.md", { responseType: ContentType.Markdown }).then(setContent);
+    fetchApi<string>("/imprint.md", { responseType: ContentType.Markdown }).then(setContent);
   }, [fetchApi]);
 
   return (
diff --git a/src/Geopilot.Frontend/src/pages/footer/privacyPolicy.tsx b/src/Geopilot.Frontend/src/pages/footer/privacyPolicy.tsx
index 6fce3174..f7e69fa4 100644
--- a/src/Geopilot.Frontend/src/pages/footer/privacyPolicy.tsx
+++ b/src/Geopilot.Frontend/src/pages/footer/privacyPolicy.tsx
@@ -12,7 +12,7 @@ export const PrivacyPolicy = () => {
   const { fetchApi } = useApi();
 
   useEffect(() => {
-    fetchApi<string>("privacy-policy.md", { responseType: ContentType.Markdown }).then(setContent);
+    fetchApi<string>("/privacy-policy.md", { responseType: ContentType.Markdown }).then(setContent);
   }, [fetchApi]);
 
   return (