I had issues with my site (www.trinityslayton.net) which is based in MediaWiki before upgrading to 1.24.1. The solutions given were to upgrade. Now I still have no http access to my site. I also have WordPress installed with no problems.
What changes have been made lately that MediaWiki isn't working anymore?
I recently updated one of my wikis to 1.24 and it works fine, with the exception of the editor.
Did you run the update script?
If so, you may want to take a look at this page: https://www.mediawiki.org/wiki/Manual:How_to_debug#SQL_errors