Failed compiling 'BuildingWorkbench.cs':
1. The type 'JsonSerializerSettings' is defined in an assembly that is not referenced. You must add a reference to assembly 'Newtonsoft.Json, Version=*.*.*.*, Culture=neutral, PublicKeyToken=null'. [CS0012]
(BuildingWorkbench 20 line 69)

What is a possible fix for this?
I've tried to uninstall and reinstall with no luck.
Currently using it on carbon if you need anymore information please feel free to reach out to me.

Sounds like a carbon issue. I would ask them about it.