I've been dealing with an odd issue where my moodle site is completely inaccessible via all browsers and platforms except IOS and Safari for Mac OS. All other browsers produce an error 503.
I've been banging my head against a wall on this as I'm not certain at all how this happened, About a month ago we installed some new SSL ceritificates for the site. If this is the cause then I'm not sure the best way to test it.
Using Moodle 3.31 on a linux environment