Dec 27 2021
seems to be fixed with newest version of 7zip.
Mar 2 2020
A simple fix could be just to append supported/unsupported behind the php version listed on Special:Version
Jul 24 2016
My wiki is also suffering from this, don't really want to roll back to 1.26 but this extension is the easiest way to fight spam. I'd be happy to help update it however I have almost no mediawiki development experience