Thank you.
I tried several of the twenty themes, including the latest one.
When I try to use the new beta theme editor on 2022 that whole page is also blank.
This is with all the plugins disabled.
I tried logging in with a Firefox build and get a 400 error, even with plugins disabled.
I think the issue comes down to Automattic deciding that everyone uses unprotected Chrome-based browsers that are allowed to connect to anything Google or Automattic and I refuse to do that. I imagine that the corporate people they are serving mostly do use some form of Chrome.
I can remember when using WordPress was a joy, it was useful and fluent. I have used it since 2004, shortly after the first version was released. Ever since the reimagining and Gutenberg it has degraded in usefulness.
Look out, sharks below. Are those forks ahead? Looks like it.