User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-35455167-20201103004626/@comment-1869454-20201103022613

Two or three months ago, further changes were made to UCP that cause its scripts to break on an awful lot of web browsers. Most if not all of what you're reporting here would be because of that - issue #2 is the most obvious sign that pages aren't loading as they're supposed to.

Updating your browser should resolve it, but if you already happen to be on the latest your device / OS supports: you're SOL.