@telarisz
I am not sure which issue you are experiencing so I will post some instructions here and close this topic. Feel free to open a new one if this doesn’t resolve your issue.
Go to WP Admin > Ultimate Member > Settings
Click Appearance then Profile Menu
You will see the Gallery menu listed
Save settings
Test it on profile
If you are trying to get the features photos on the main tab. Make sure you have chosen a default tab in Ultimate Member settings and make sure that Gallery Setting “Show on Main Tab” is set to Yes. It’s good to just hit save on each setting page just to be doubly sure.
Again, if you continue to have issues with this plugin. Feel free to open a next topic for it.