TeamsFixer
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GENERIC-STARTUP Severity: Medium

We are sorry, we have run into an issue

Teams will not start and shows a generic error without a code. Here is how to find the real cause.

Last verified:

Affected systems

windows macos

Symptoms

  • Teams shows 'We are sorry, we have run into an issue'
  • The app launches briefly and then closes
  • No specific error code is visible

Possible causes

  • Corrupt local cache
  • Outdated Teams version
  • Conflicting add-ins or third-party tools (antivirus, Snap Camera)
  • Missing WebView2 component on Windows
  • Corrupt Keychain on macOS

Solutions

1.Clear cache (classic and new client)

  1. Quit Teams via Task Manager or Activity Monitor so no process remains.

  2. Delete the classic cache.

    %appdata%\Microsoft\Teams
    ~/Library/Application Support/Microsoft/Teams

  3. Delete the new cache.

    %localappdata%\Packages\MSTeams_8wekyb3d8bbwe\LocalCache
    ~/Library/Group Containers/UBF8T346G9.com.microsoft.teams

  4. Restart Teams.

2.Update to the latest version

Windows

  1. Open the Microsoft Store or Microsoft 365 app center.

  2. Check for Teams updates and install them.

  3. Reboot.

macOS

  1. Open Microsoft AutoUpdate (Help → Check for Updates in any Office app).

  2. Install updates for 'Microsoft Teams'.

  3. Quit and relaunch Teams.

3.Install WebView2 runtime (Windows)

Windows

  1. Download the runtime from Microsoft.

  2. URL: https://developer.microsoft.com/microsoft-edge/webview2/

  3. Install the Evergreen version with admin rights.

  4. Reboot.

4.Collect logs and send to IT

  1. If nothing else helps, collect the diagnostic logs.

  2. Logs file.

    %appdata%\Microsoft\Teams\logs.txt
    ~/Library/Application Support/Microsoft/Teams/logs.txt

  3. Send the file to IT - the real error code usually shows up there.

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