Exception has been thrown by the target of an invocation.
System.NullReferenceException: Object reference not set to an instance of an object.
   at Editor.DooEditor.InvokeBlock.BuildUI() in C:\program files (x86)\steam\steamapps\common\sbox\editor\dooeditor\code\DooEditor\BlockEditors\InvokeBlock.cs:line 42
   at Editor.DooEditor.InvokeBlock..ctor(SerializedObject obj) in C:\program files (x86)\steam\steamapps\common\sbox\editor\dooeditor\code\DooEditor\BlockEditors\InvokeBlock.cs:line 33
   at InvokeStub_InvokeBlock..ctor(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)