Thread:Project:Support desk/MediaWiki 1.22.0 upgrade triggers HTTP 500 Internal Server Error/reply (2)

I was just setting up a brand new wiki with no mods or extensions on a shared server and ran into a similar problem. Initially the wiki installed without issue, and even displayed the main page. Any attempt to login, however, results in a long wait before giving a 500 error. Additionally, after experiencing this error, the entire wiki becomes similarly non-responsive, regardless of which page is visited, including previously functional pages. Other web pages outside of the wiki seem to work fine. Interestingly, in my case, the wiki is only non-responsive to the person who tried to login (perhaps a cookie issue? Haven't tested it thoroughly), until those other people try to login.

I've tried reinstalling with various options changed, to no avail. When I install under the previous stable version of Mediawiki, however, it runs perfectly for everyone.

I'm posting from my phone so I don't have my versions handy. I know they match or exceed the requirements to run a wiki, though.