Ok, this seems to be an issue with W3 Total Cache plug, with the JS Minify option, after a bit of troubleshooting, though it was working fine for the last 2 days.
I just updated on one site from 4.3 to 4.4 but I still get the same result. I have all options at default except /login/, is accessible. Am I specifying this correctly? What is best?
Interesting Ovidiu, thanks for the tip. I’m going to look into a CDN. Which one do you use?
great catch, thanks greatly!
