If you are unable to update the MiScore app because Google Play is stuck on Pending, 

attempt these instructions as posted on the Google support site.


They suggest to clear Google Play Store's app cache, to solve the pending problem. Just follow these instructions:
  1. Open your device's Settings app Settings.
  2. Tap Apps & notifications and then See all apps.
  3. Scroll down and tap Google Play Store Google Play.
  4. Tap Storage and then Clear Cache.
  5. Next, tap Clear data.
Then try to re-open the Google Play Store and attempt to restart the MiScore app.

Also if you have a setting to not allow updates to occur while device is on mobile data, then please attempt to update on a Wifi connection instead. 

how to connect to Wifi > https://support.google.com/android/answer/9075847?hl=en