Loading modules

I’m trying to load some external modules into Audacity but found some problems. My OS is Mojave 10.14.2.
First I added a ‘modules’ folder to Audacity (ver. 2.1.5) installation folder, inserted the modules inside the folder and in the modules preference menu changed their status from new to enabled but it failed to load them.
Then I updated to Audacity 2.3.0, made the same procedure but in the modules preference menu didn’t appear any module loaded.
Could be a version problem?
Last I tried to search a previous version of Audacity (2.0.x) from the download page but it tells me the service is unavailable.
Any suggestion?

Which “modules”? Where did you get them?