Hi Everyone,
We recently updated to Mediawiki 1.36. I'm testing some of our installed skins under it.
Most skins are causing this warning to be printed on the top of each page. But it looks like this may be a HitCounter issue:
Deprecated: Use of SkinTemplateOutputPageBeforeExec hook (used in HitCounters\Hooks::onSkinTemplateOutputPageBeforeExec) was deprecated in MediaWiki 1.35. [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/w/includes/HookContainer/HookContainer.php at line 137] in /var/www/html/w/includes/debug/MWDebug.php on line 376
I have no idea why we are running debug code on a production server. I guess that's a separate issue for the Mediawiki folks.
My apologies if this is not a HitCounter issue.
Our mediawiki information can be found here.