There may still be a problem using hotfix 2. On my grid builder if I add any Actor Node it is still crashing immediately. Not much useful in the logs though:
[2016.12.02-15.54.09:499][955]LogCrashTracker:
[2016.12.02-15.54.09:499][955]LogCrashTracker:
[2016.12.02-15.54.09:499][955]LogWindows:Error: === Critical error: ===
[2016.12.02-15.54.09:499][955]LogWindows:Error:
[2016.12.02-15.54.09:499][955]LogWindows:Error: Fatal error!
[2016.12.02-15.54.09:499][955]LogWindows:Error:
[2016.12.02-15.54.09:499][955]LogWindows:Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000010