When I click to download on the modportal, it says "unable to install required dependencies for pY mods pack: There is no compatible version of pycoalprocessing on the mod portal.. Would you like to install the mod without dependencies?" "Back/Confirm" Even though I already have the version of Pycoalprocessing installed from the dependencies list. This also happened before I installed that mod.

From pY discord (probably problem with it):
The current portal versions require the experimental version of Factorio (>=1.1.78). Instructions for switching if you're on the stable version are below
https://wiki.factorio.com/Install_guide#Downloading_and_installing_experimental_versions