It sounds like you're having trouble accessing a third-party app within Microsoft Teams.
One possible solution is to try reinstalling the app. To do this, go to the Apps section in Teams and find the app that you're having trouble with. Click on the ellipsis (...) next to the app and select "Uninstall". Once the app is uninstalled, try reinstalling it and see if that resolves the issue.
If that doesn't work, you can try clearing the Teams cache. To do this, close Teams completely and then go to the following folder on your computer: %appdata%\Microsoft\Teams. Delete all the files and folders in this folder, then restart Teams and try accessing the app again.
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