com.unity.collab-proxy/editor/collaborate/assets/layouts/mainpageview.uml finishing import

I'm trying to upgrade my project from the current 2020 LTS to the latest 2021 version because there's a bug fix in 2021 to animation rigging that I need.

Whenever I try to upgrade, at around the 2 hour mark, Unity gets stuck on:
"com.unity.collab-proxy/editor/collaborate/assets/layouts/mainpageview.uml finishing import"

I'm using Plasti

 

I'm using plastic SCM and have tried deleting the Library folder and restarting the process. Because this problem doesn't pop up until 2 hours in means that any solution I try takes 2 hours to see if it worked.

*every time I try to edit the thread it says "Access denied". Unity just hates me all of a sudden I guess.

 

Alright for some reason this time around when it got stuck on it I just closed & reopened without doing anything else and it opened up. Although then it tells me it needs to upgrade URP materials to new version and then when it tries to says its run out of memory.