https://discussions.unity.com/t/1-16-10-null-reference-on-assetreferencedrawer/817134
1.16.10 Null Reference on AssetReferenceDrawer - Unity Engine - Unity Discussions
Nov 17, 2020 - Getting this after upgrading to 1.16.10 on an object that has an AssetReferenceSprite: NullReferenceException: Object reference not set to an instance of an...
unity enginenullreferencediscussions