NullReferenceException: Object reference not set to an instance of an object
Unity.Cloud.Collaborate.UserInterface.CollaborateWindow.OnDisable () (at Library/PackageCache/com.unity.collab-proxy@1.5.7/Editor/Collaborate/UserInterface/CollaborateWindow.cs:86)
I started to get the above error a few days ago. I can’t seem to figure out what is causing it? I’m using the most recent version of Unity (2021.1.10f1) and have rebooted many times. The message shows up when I run my game.
Is something going on with Collab, or did I do something?
Hi Close Collaborate Window and reopen it (Window ->Collaborate) this helps me
@toddhdavis I had the same issue in 2020.3.10f1 recently and managed to resolve it by using Package Manager to remove Version Control, re-installed it and so far seems to have done the trick. Not sure if it’ll be the same in your version though!
Thank you UnHeardD, I appreciate the suggestion. I tried what you suggested (it was a good idea!) but it does not seem to have made any difference. 
Helo @toddhdavis .
I was having this same problem.
I solved this by disabling the “Analytics - Discover Players Insights” service in the “Manage Services” menu.
I hope it helps.
Sorry for my writing, I used google translator.
Cheers.,Helo!
I was having this same problem.
I solved this by disabling the “Analytics - Discover Players Insights” service in the “Manage Services” menu.
I hope it helps.
Sorry for my writing, I used google translator.
Same issue here with 2021.1.12f1. Has Unity reacted yet?
The reason for the error is that when I delete the analysis from the package manager, I find it still exists in the “packages” file, and then manually modify manifest.json and packages-lock.json. The solution is to close the analysis service and close the “services” window