[BUG]
I was running around an official server, and got kicked with the following error message:
Disconnected: Exception (cs:87309): Null ReferenceException: Object reference not set to an instance of an object. Building Block.FinishUpgradeEffect () (at ...
Don't believe I was near anyone building. I enabled the experimental Global Rendering btw. Windows 10, RTX 3070, Ryzen 5 5600X
Thank you for the report. We're tracking this issue and hope to have a fix out in the coming hours.