Okay – I worked out the problem – it’s CSF.
It’s not a huge problem for me to deactivate CSF for the few minutes when I’m making major changes to the site. It seems to have fallen out with WordPress. I could flush the IP tables or something but for now, I think temporary deactivation is the best solution.
Another weird symptom: I was able to click to change my theme, but it would not actually confirm. It also stopped FTP from working.
It will have to do with the port and country blocking setup I had on CSF. I had blocked ports for a number of countries because I thought me and my server won’t be there – but of course, sometimes there is a legitimate reason why a US-based server, for example, will be accessing something other than port 80. ??
I’d still like to hear about any better explanations and solutions people may have, though!
