Fixing MS Teams error 80080300 - we’ve run into an issue

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When I went to open Teams this morning I was greeted by the error “ We’re sorry – we’ve run into an issue”. I tried a bunch of troubleshooting including:

  • Signing out/back in
  • Deleting everything in %appdata%\Microsoft\Teams
  • Uninstalling and reinstalling Teams

none of which worked.

After more extensive googling I found a post which suggested a fix:

  1. Kill off Teams and make sure the tray icon has gone too
  2. Find the shortcut for teams
  3. Go to the compatibility tab and set the compatibility mode to Windows 8

On starting Team from the changed icon it worked fine. I could also then kill off Teams, undo the compatibility hack and restart Teams without issue…