I have two unraid servers are running with valid license:
1. Unraid 6.11.10, Plus license

2. Unraid 6.11.13, Basic license

Both cannot show Upgrade / Downgrade UI content after upgrade as attachement, after upgraded from previous version to the versions that mentioned above.
Is anything wrong on my side or any method to resolve the problem?

Try booting in safe mode

43 minutes ago, JorgeB said:

Try booting in safe mode

Thanks for your suggestion. You mean that I need to start up with safe mode in order to upgrade the OS in future time?
However, I think it is not a perfect solution on this case.
Since both servers are running on totally diff hardware, I don't know why cannot show the update / downgrade screen in normal boot.
 

26 minutes ago, John Hui said:

Thanks for your suggestion. You mean that I need to start up with safe mode in order to upgrade the OS in future time?
However, I think it is not a perfect solution on this case.
Since both servers are running on totally diff hardware, I don't know why cannot show the update / downgrade screen in normal boot.
 

I think the suggestion to try booting in Safe Mode is to see whether a plugin is causing your issue as there have not been other similar reports.

 

If you do not want to reboot you could also try the Dynamix Safe Mode plugin although I am not certain that fully replicates the Safe Mode Boot option.  

20 minutes ago, itimpi said:

I think the suggestion to try booting in Safe Mode is to see whether a plugin is causing your issue as there have not been other similar reports.

 

If you do not want to reboot you could also try the Dynamix Safe Mode plugin although I am not certain that fully replicates the Safe Mode Boot option.  

Just tried Dynamix safe mode and the result is same.
May be I need to reboot in safe mode to try it again.