Error loading Teams App - Sorry, we ran into a problem loading this app. Please reload the page or try another time.

Question

Hi,

I created a Teams app to publish our web app on Microsoft Teams, 365, and Office. However, I get Sorry, we ran into a problem loading this app. Please reload the page or try another time. error after a few seconds of loading the page.

The console shows "failed reason: AppInitTimeout" message. but I am unable to find the main reason for the error.

Our web app works fine on Microsoft 365, except for this error. In Microsoft Teams, I don't see any error message at all.

I found a similar case on the community forum: https://learn.microsoft.com/en-us/answers/questions/2006986/how-to-fix-the-sorry-we-ran-into-a-problem-loading?source=docs

Manifest version is 1.16. I can share the Teams App Package if anyone needs to reproduce the issue.

Answer 1

The error message "Sorry, we ran into a problem loading this app. Please reload the page or try another time." with the console message "failed reason: AppInitTimeout" usually indicates that the app is taking too long to initialize. This can be caused by a variety of reasons, such as large file sizes or complex code.

One possible solution is to optimize the app's code and reduce the file size. Another solution is to increase the timeout limit for app initialization. You can do this by adding the following line to the manifest.json file: "appTimeoutInSeconds": 60, where 60 is the number of seconds you want to set as the timeout limit.

If the issue persists, you can try clearing your browser cache or using a different browser. You can also try opening the app in the Teams desktop app instead of the web app.

References:

• Troubleshoot your Microsoft Teams app - Issues with packaging and uploading
• Common reasons for app validation failure

Answer 2

Any update?

We have the same issue, but the waning banner appear on any custom apps. In our case, the banner is without the words, but in the browser developer console, we the the error 'failed reason: AppInit timeout'

Following some screenshot:

This happen on many apps:

Any idea?

Thank you