Problems installing sc3 plugins

I am using supercollider so that I can use tidalcycles. There are some extra effects that I would like to use and I am trying to install them. I downloaded the SC3plugins zip file but I am not sure where to install them. I am using OS X 10.14.6
this is the error I get when I put them in the extensions folder - there are a lot of errors - starting with ones like this *** ERROR: API Version Mismatch: /Users/tarapattenden/Library/Application Support/SuperCollider/Extensions/BBCut2UGens/BBCut2UGens.scx
I don’t get errors if I put them in the downloaded quarks folder however the effects don’t work in tidal, the sounds play just no effects are applied
Any help on how to do this would be greatly appreciated. I would like to use squiz and other effects in tidalcycles.

Which version of the sc3-plugins did you download? And which version of SC are you using?