Closed pppery closed 9 months ago
https://www.mediawiki.org/wiki/Manual:Hooks/SkinTemplateNavigation was removed in MediaWiki 1.41
Make sure u download the correct branch. REL1_39 uses "SkinTemplateNavigation::Universal". That said, FlexForm officially only supports LTS versions of MediaWiki.
https://www.mediawiki.org/wiki/Manual:Hooks/SkinTemplateNavigation was removed in MediaWiki 1.41