Vivoactive 5 update problem - stuck on software version 11.14

My vivoactive 5 is stuck on software version 11.14 and keeps getting notifications to update to the latest version.

I have tried to update the software manually through the watch (which has a wifi connection) and have tried through Garmin Express. Neither ways have worked.

Is this a bug with my watch or is there another solution to update the software on the watch?