guajars

Hello @jamesosborne
Just like what happened to @paulopietro, the problem disappeared and now it’s like there was no problem at all.
Yesterday there was a console problem too at the same time: “ReferenceError: commonL10n is not defined error”. I don’t have an actual screen capture, but found another guy with the same problem (https://prnt.sc/u030gj). The console error disappeared today too.
Maybe both problems are related somehow.
I hope it helps.
Best regards.

I had the same problem today morning. After reading here the .htaccess relation, I just updated a not-so-old .htaccess file and the problem was solved.