Topic on Extension talk:Semantic Organization

If you extract the latest SO zip (with Custom.css 4.53), and cut and paste semorg.kollabor's Features Page, the Boostrap 4 "cards card-columns" div does not work.

Tweeki skin is based on Bootstrap (v3.4.1 or v4.4.1 via opt-in).

Must LocalSettings be amended to enable SO to opt in?

SemanticOrganizationHooks looks for the following $wgTweekiSkinUseBootstrap4 = true; $wgTweekiSkinUseExternallinkStyles = false; $wgSemorgUseCustomTweekiFiles == false;

No, there is no explicit opt-in necessary. SO does it for you as it depends on Bootstrap 4 features. I can't reproduce your issue with a fresh install of SO and Tweeki. Are there any customizations from your side that could be responsible? Is your wiki publicly available?

After much fiddling I resolved all by going back to

MediaWiki 1.31.1

Semantic MediaWiki 2.5.8.