Fix an installed Android app that isn't working

Restart & update

To restart your phone, press and hold the Power button for a few seconds. Then, on your screen, tap Restart Restart.

If you don't see "Restart," press and hold the Power button for about 30 seconds, until your phone restarts.

System updates can bring improvements that may fix your issue.

To check for and install system updates:

  1. Open your device's Settings app Settings app.
  2. Near the bottom, tap System and then System updates. (If needed, first tap About phone or About tablet.)
  3. You'll see your update status. Follow any on-screen steps.

App updates can bring improvements that may fix your issue.

To see and get updates for your apps:

  1. Open your device's Play Store app Google Play.
  2. Tap Menu Menu and then My apps & games.
  3. Apps with available updates are labeled "Update."
    • If an update is available, tap Update.
    • If more updates are available, tap Update all.

     

If you are still expierancing an issue with the app please read the floowing article from Google to troubleshoot the issue.

https://support.google.com/nexus/answer/2668665?hl=en