Teams Custom App stuck on a blank white screen

Question

Every time I click on the custom app icon in the sidebar, the whole screen just stays completely white. Sometimes a little spinning circle appears for a second, but then nothing happens. My friends can see it just fine on their computers, so I feel like I'm doing something wrong with my settings.

​I even tried logging out and logging back in, but it’s like the app is just "stuck" for me.

​Is there a way to "refresh" just one app in Teams without having to delete the whole Teams program and download it again?

Answer 1

Hi silvio aldin

Thank you for reaching out to Microsoft Q&A forum

As far as I know, Teams doesn’t currently have a “refresh just this one app” button for the left‑rail (personal) app experience. However, you can try workaround approach below to see if it can help you:

1/ Clear/Reset Teams cache

Microsoft’s troubleshooting guidance recommends clearing the Teams client cache and then restarting Teams

2/ Remove and Reinstall the Specific App

Instead of reinstalling the entire Teams client, you can uninstall just the problematic app to clear its local instance.

• Right-click the custom app icon on the left sidebar.
• Select Uninstall. (If your organization restricts this, proceed to the next method).
• Navigate to the Apps icon in the sidebar.
• Search for the custom app and add it back. This forces Teams to fetch a fresh instance of the application.

Hope my answer will help you, for any further concern, kindly let me know in the comment section.

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Answer 2

If your custom app in Microsoft Teams is stuck on a blank white screen, it could be due to several reasons. Here are some steps you can try to resolve the issue:

1. Clear Cache: Sometimes, clearing the Teams cache can help resolve display issues. You can do this by closing Teams, navigating to %appdata%\Microsoft\Teams, and deleting the contents of the Cache folder. Restart Teams afterward.
2. Check Content Display: Ensure that your content can be displayed in an <iframe>. If the content domain isn't in the validDomains list in the app manifest, it may not render properly.
3. Dev Tools: You can open Dev Tools in the Teams client (similar to pressing F12 in a browser) to check for any errors that might indicate what's going wrong.
4. Network Issues: Check your internet connection and ensure that there are no network issues that might be affecting the loading of the app.
5. Reinstall the App: If the above steps do not work, you might consider removing and re-adding the app instead of reinstalling the entire Teams application. This can often resolve issues specific to the app without affecting the rest of Teams.

If the problem persists after trying these steps, you may want to reach out to your IT support or consult Microsoft Support for further assistance.

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References:

• Troubleshoot your Microsoft Teams app