why am i not able to upgrade the roblox app on my sons account /ipad. we have family sharing

https://discussions.apple.com/thread/251459107 is locked, so starting new thread.

I had the EXACT same experience as ItIsMePhany. (Phil0124 is wrong.)

There is something broken with updating Roblox, and the AppStore is showing this problem as needing to log in, which is broken.

• I confirmed that I had the right AppleId by turning off child restrictions and going into the AppleId Settings.
• I confirmed that I had the child AppleId password correct by going to the AppleId site.
• I confirmed that an Getting a new app worked just fine. This confirming that child was logged in correctly.
• One thing to note is that the icon for Roblox on-device was different from AppStore, which suggested a major version change.

Smells like a Roblox bug, combined with an AppStore (child account?) bug?

Anyway, after all that, my only option was to delete Roblox and install it new. That worked.