I got the same, i was using the Web UI in French, switching to English solved the problem
the problem was located in JS function anonymous()
at line
t.b("" class=âpretty-linkâ>others");
Where âotherâ translates to âdâautresâ in french, resulting in Javascript failure to break most twitter pages.
I was able to access the account settings using my account url /twitter.com/xyzaccount