Unity 2019.3.0B12 starts spamming errors in existing project after upgrade.

Hi,
I just upgraded to b12, and I start to get a lot of errors in debug log. I can't supress those errors and they keep coming at quite fast pace. Super annoying. I know I should probably upgrade to latest package versions, but as the errors keep piling up and I open package manager, it doesn't seem to be loading anything. Just stays empty for minutes. And using a fresh project is really not an option as I would like to upgrade this one.
Is it possible to upgrade packages outside of Unity or use some other trick to get past this issue?

Here's one error sample:
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.VFX.VFXAbstractRenderedOutput.GetSettings (System.Boolean listHidden, UnityEditor.VFX.VFXSettingAttribute+VisibleFlags flags) (at Library/PackageCache/com.unity.visualeffectgraph@7.1.2/Editor/Models/Contexts/Implementations/VFXAbstractRenderedOutput.cs:159)

 

Ok. Looks like I got this working somehow by Reset packages to default in help menu, and then installed HDRP again... Not really good and I probably messed up a thing or two in the project. Sigh.

 

Thanks so much man you are a life saver

 

Not sure if related, but my visual studio solution started getting a million fake errors after this update. The errors were things like missing classes (reference missing) - but the errors were false positives and I had no issue still running the app.