What could be causing AJAX to fail?

[SJ77]

I create a post and it just sits there like it's saving.. I have to refresh the page to see the post.

It get's stuck on the saving step.

Browser FIRE FOX

 

Edited June 7, 2020 by SJ77

[SJ77]

also now I repeatedly get this when I try to log into the ACP

Something is fishy here.