NullReferenceExeption error

[ThyGentleman]

I cannot for the life of me figure out what is wrong and how to make this error go away.

[Kurt-Dekker]

This specific error, coming from this location (eg, NOT your code, such as UnityEditor.Graphs or PlasticSCM as in your case above), is often fixed by either Reset Layouts (upper right) or else Right-click Project, Reimport-All.

Extra unwanted packages in new projects (collab, testing, rider and other junk):

Temp/UnityEngine.TestRunner.dll Error

Recent versions of unity have an annoying habit of crapping useless packages into your project. When those packages inevitably have errors, this sort of thing happens. I have railed about it before. Go into the package manager and remove crap you don’t need, like the entire test runner and collab and whatnot. If you feel brave you can hand-edit the Packages/manifest.json file a lot faster than using the laggy package manager interface that only lets you remove one package at a time: [7287748-…

Sometimes the package system gets borked from all this unnecessary churn and requires the package cache to be cleared:

Unity3D Package Cache errors(?)

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Otherwise, if the error is in your code, it’s always the same answer:

The answer is always the same… ALWAYS!

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:

• Identify what is null ← any other action taken before this step is WASTED TIME
• Identify why it is null
• Fix that

[_geo1]

1. Welcome to the Unity forum

2. Remove that PlasticSCM folder in your PackageCache (path is in the error message) and maybe try to also uninstall the plastic scm package (I assume you are not using it anyways).