I have a MediaWiki site that was set up with some basic rules (3) on a free Cloudflare account that I have had for years (with no problem). And everything worked fine until about 30 hours ago. Then suddenly my site started to have problems. A simple thing like the User Preferences page would not load correctly. (Usually there are 6 tabs but now, with Cloudflare active, there were no tabs.) Many extensions failed to load. And so on.
I tried many solutions, tested different rules, cleared the Cloudflare cache numerous times, contacted my hosting service (RoseHosting.com) and let them investigate the problem on Cloudflare. In the end, the only thing that worked to fix the problem was to pause the Cloudflare service. Even with no rules applied, just routing traffic over the Cloudflare server would break my site (as described above). So it really looks like the problem is here on Cloudflare… unless something very bizarre is happening over at my hosting provider (RoseHosting.com) which seems unlikely.
So I am wondering whether Cloudflare still works correctly with MediaWiki sites. I don’t see how it could just be my site that is having an issue, but - even if so - neither I nor the RoseHosting technicians have any other ideas on how to fix this Cloudflare-related problem. For now, my only recourse seems to be to reluctantly disable all of my Cloudflare services (putting my site on Pause). Of course this is not something I want to do, because it reduces the speed of my site. Can anyone think of a possible solution that has not already been described above?