Multiple errors after updating asset package from store

Hi all, I'm am asking this because yesterday I ran into many errors after I updated an Asset from the store that's rendering many things unusable. The asset is "Skele" for animating in unity editor; however, I am not so sure that this is the direct cause. I am getting errors now from a few of my other assets (Shader Forge, Skele, and Particle Playground).

It seems that they all have something to do with the Editor scripts, as sometimes the editor controls in the inspector don't load properly for them- the Skele inspector controls refuse to load entirely.

I have searched high and low, and have uninstalled/reinstalled Unity, deleted 'Library' folder, force a re-import of all assets, and have deleted/updated/and reinstalled all of the Assets. The assets all work fine in other projects, so I have also tried to create a new project, and import all the assets over - still causing issues.

It's causing me issues to the point where I can't play the game, nor can I build, so I am ready to get this sorted out. I am attaching a couple images with the errors I am experiencing (all causing current issues are in the scripts that come with the asset packages). While it doesn't specifically show the folders for the Skele asset, I am getting these errors in general in it as well - the 'Type' issues being shown here.

Thank you for your time!