Broken Project after update from 2021.3.3f1 to 2022.1.7f1

Hello !
Sorry to bother you, I wanted to update my project (and didn’t backup) from 2021.3.3f1 to 2022.1.7f1 and I have now a lot of errors in my Editor.


I am not sure you to resolve these, it seems the packages (2D animation for example) don’t work correctly.
In the package manager, it shows 2D Animation 8.0.2 “This package version doesn’t have a valid signature” but I can’t click on “remove” to reinstall it.
I can still use the Editor but this error keep showing:

Assertion failed on expression: 'it->second.IsValid()'
UnityEditor.EditorApplication:Internal_CallGlobalEventHandler ()

My scripts are still there but can’t compile (I guess because of the Editor error) and my some of my prefabs are lost.
Is there any way to fix it or should I try to reopen the project on the old version to import the game, parts by parts, to the new one ?
I appreciate any help !

start with the first error in the list
if it refers to a package try to update it to the „recommended“ version for the given unity version
if you need to manually uninstall a package edit the manifest.json in the Packages folder

do not try to open in the old editor version, most likely the mess will just get worse. upgrading errors are way easier to fix.

anyhow, lesson learned, i guess … :wink:

Thank you very much for your help !
Sorry I didn’t answer sooner, I was moving recently.

I managed to fix almost everything by setting my package list to default and reinstalling the ones I used.
But I still have some errors in the console, I think it has something to do with network but I don’t know how to fix it, because my Game is built for windows, not for a server.




Am I missing something ?
Is it something specific to the 2022 unity version ?
Thank you in advance for your help !

Update:
setting “downoads over HTTP = always” fixed it but I’m not sure it’s the best thing to do @CodeSmile