On deleting Text (TMP) prefab from Project window causes editor to throw MissingReferenceException, after that same exception is thrown on creating/deleting any prefab(eg. Primitive GameObject Prefab), refer attached video.

Steps to repro:
1. Create a new Project
2. Hierarchy > Create > Create Empty gameobject
3. Hierarchy > Create > 3D Objects > TMP Text - TextMeshPro
4. Make prefab of "Empty gameobject" and "TMP Text - TextMeshPro"
5. Make "TMP Text - TextMeshPro" object as a child of Empty gameobject
6. Inspector > Overrides > Apply All
7. Delete "TMP Text - TextMeshPro" prefab from Project Window

Actual Result:
MissingReferenceException is thrown on deleting Text (TMP) prefab.

Expected Result:
Prefab is deleted without any exceptions.

Tested with Unity versions:
2020.1.0a17, 2019.3.0f4

Package found version: preview.3 - 3.0.0, preview.1 - 3.0.0

Package working fine version: 2.0.1

Environment:
Windows10 and macOS 10.14

Stack trace:
MissingReferenceException: The object of type 'TextMeshPro' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
TMPro.TextMeshPro.OnPrefabInstanceUpdate (UnityEngine.GameObject go) (at Library/PackageCache/com.unity.textmeshpro@3.0.0-preview.3/Scripts/Runtime/TMPro_Private.cs:303)
UnityEditor.PrefabUtility.Internal_CallPrefabInstanceUpdated (UnityEngine.GameObject instance) (at <abcb5714b99e4fb3a117425953eb603c>:0)
UnityEditor.ProjectBrowser:DeleteSelectedAssets(Boolean)