diff --git a/lib/data_source/jellyfin_api.ml b/lib/data_source/jellyfin_api.ml
index 7bcc5e1..9edbe86 100644
--- a/lib/data_source/jellyfin_api.ml
+++ b/lib/data_source/jellyfin_api.ml
@@ -198,7 +198,10 @@ module Item = struct
     id : string; [@key "Id"]
     path : string option; [@yojson.option] [@key "Path"]
     album_id : string option; [@yojson.option] [@key "AlbumId"]
-    parent_id : string option; [@yojson.option] [@key "ParentId"]
+    parent_id : string option option;
+        (* [ParentId] might absent, [null], or a string *)
+        [@yojson.option]
+        [@key "ParentId"]
     server_id : string; [@key "ServerId"]
     image_blur_hashes : image_blur_hashes; [@key "ImageBlurHashes"]
     type_ : type_str; [@key "Type"]
@@ -345,7 +348,6 @@ let request (type pp p r) ?base_url ?token ?headers
   let yojson = Yojson.Safe.from_string (Jstr.to_string json) in
   try Q.response_of_yojson yojson
   with e ->
-    Console.log
-      [ "An error occured while decoding the following response: "; yojson ];
+    Console.log [ "An error occured while decoding response: "; json ];
     Console.log [ e ];
     raise e
diff --git a/lib/db/sync.ml b/lib/db/sync.ml
index 6412b2b..4d72b9f 100644
--- a/lib/db/sync.ml
+++ b/lib/db/sync.ml
@@ -217,7 +217,9 @@ let deduce_virtual_folders_from_views source (views : Views.response) =
     in
     List.fold_left ~init:String.Set.empty res.items
       ~f:(fun set { Item.parent_id; _ } ->
-        match parent_id with None -> set | Some pid -> String.Set.add pid set)
+        match parent_id with
+        | None | Some None -> set
+        | Some (Some pid) -> String.Set.add pid set)
   in
   let paths_of_parents parents =
     let+ res =