diff --git a/server/src/main/java/org/allaymc/server/extension/ExtensionManager.java b/server/src/main/java/org/allaymc/server/extension/ExtensionManager.java
index 33bf9a25a..f458679cd 100644
--- a/server/src/main/java/org/allaymc/server/extension/ExtensionManager.java
+++ b/server/src/main/java/org/allaymc/server/extension/ExtensionManager.java
@@ -37,8 +37,16 @@ public void loadExtensions(String[] args) {
     }
 
     private void loadExtension(Path extensionPath, String[] args) {
-        log.info(I18n.get().tr(TrKeys.A_EXTENSION_LOADING, extensionPath));
+        log.info(I18n.get().tr(TrKeys.A_EXTENSION_LOADING, extensionPath.getFileName()));
+        Allay.EXTRA_RESOURCE_CLASS_LOADER.addJar(extensionPath);
+
+        // Try to load the main class of the extension if it exists
         var mainClass = findMainClass(extensionPath);
+        if (mainClass == null) {
+            // Main class can be null
+            return;
+        }
+
         if (!Extension.class.isAssignableFrom(mainClass)) {
             throw new ExtensionException(I18n.get().tr(TrKeys.A_EXTENSION_MAINCLASS_TYPEINVALID, mainClass.getName()));
         }
@@ -57,8 +65,11 @@ private void loadExtension(Path extensionPath, String[] args) {
     private Class<?> findMainClass(Path extensionPath) {
         var jarFileSystem = FileSystems.newFileSystem(extensionPath);
         try {
-            var entrance = (String) JSONUtils.fromMap(Files.readString(jarFileSystem.getPath("extension.json"))).get("entrance");
-            Allay.EXTRA_RESOURCE_CLASS_LOADER.addJar(extensionPath);
+            var extensionDescriptorPath = jarFileSystem.getPath("extension.json");
+            if (!Files.exists(extensionDescriptorPath)) {
+                return null;
+            }
+            var entrance = (String) JSONUtils.fromMap(Files.readString(extensionDescriptorPath)).get("entrance");
             return Allay.EXTRA_RESOURCE_CLASS_LOADER.loadClass(entrance);
         } catch (ClassNotFoundException e1) {
             throw new ExtensionException(I18n.get().tr(TrKeys.A_EXTENSION_ENTRANCE_MISSING, extensionPath));
diff --git a/server/src/main/java/org/allaymc/server/utils/DynamicURLClassLoader.java b/server/src/main/java/org/allaymc/server/utils/DynamicURLClassLoader.java
index a105c000d..929ec6882 100644
--- a/server/src/main/java/org/allaymc/server/utils/DynamicURLClassLoader.java
+++ b/server/src/main/java/org/allaymc/server/utils/DynamicURLClassLoader.java
@@ -26,23 +26,12 @@ public DynamicURLClassLoader(URL[] urls, ClassLoader parent) {
     public void addURL(URL url) {
         super.addURL(url);
     }
-
-    public void addJar(File jarFile) {
-        Preconditions.checkNotNull(jarFile);
+    public void addJar(Path jarPath) {
+        Preconditions.checkNotNull(jarPath);
         try {
-            addURL(jarFile.toURI().toURL());
+            addURL(jarPath.toUri().toURL());
         } catch (MalformedURLException e) {
             log.error(e.getCause().getMessage());
         }
     }
-
-    public void addJar(Path jarPath) {
-        Preconditions.checkNotNull(jarPath);
-        addJar(jarPath.toFile());
-    }
-
-    public void addJar(String jarPath) {
-        Preconditions.checkNotNull(jarPath);
-        addJar(new File(jarPath));
-    }
 }