Downloaded plug-ins not working

I am using audacity 2.4.1 on ubuntu 20.04 and I can’t get .so plug-ins to work.they wont appear in the nyquist plug-in installer unless I drag them in even then a error pops up saying its an unsupported file type. I originally was trying to download gsnap and autotalent but neither work nor any other downloaded plug in so far. If someone could help me find where I went wrong they’d be the dopest person alive.

You’ve not said where you got Audacity 2.4.1 from, but I’d guess this is the problem: