Third party plugin installation and usage

Hello there! I seriously need a hand to understand how can I create a file importer at runtime, I know there are some plugins but none of them work for me mostly because Unreal gets me some errors that I don’t know how to manage and eventually resolve.

I’ve got installed three engine versions: 4.25, 4.24, and 4.22, I found these plugins:

I tried to install those extracting the zip into the folder MyProject/Plugins but, starting the project asks me if I want to rebuild the plugins, then the error " couldn’t rebuild it, try to rebuild from the source manually" or, if everything goes well, the plugin doesn’t appear in the plugins list.

Surely I’m doing something wrong…but what?
Imgur: The magic of the Internet that’s the path