I’m working on an Umbraco 13.9.3 project, running directly from Visual Studio (IIS Express). I’ve encountered a strange issue when uploading new media files.
Problem:
When uploading a new file via the media section (drag-and-drop area or media picker via a content node), the request to:
/umbraco/backoffice/umbracoapi/media/PostAddFile
hangs and does not respond.
After a long wait, I get a rejection from AngularJS (likely a timeout or unresolved promise).
However, once the Media folder is refreshed, the uploaded file is visible — so the file does get uploaded, but the UI hangs and doesn’t respond as expected.
Additional Info:
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I’m able to replace existing media item files using the File Upload property without any issues.
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This behavior is only happening when adding new media, not replacing.
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The issue occurs only on my system — my colleagues do not experience the issue using the same codebase and database.
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I also created a new Umbraco 13.9.3 project within the same solution, and the file upload works perfectly there.
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The current project is working with a 10 GB database and a large number of content nodes, which might be relevant to the performance or request handling.
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No errors appear in the server logs.
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Using Chrome Developer Tools, the POST request just stays pending with no response from the server.
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Running the project directly from Visual Studio (IIS Express).
Has anyone encountered something similar or have any suggestions? I’m open to configuration tweaks or debugging tips. Any help would be greatly appreciated.