Hi Ajho.
This error is caused by a failure in loading needed libraries for the rule though there are no script errors inside those libraries ... N3V did not succeeded in finding how and why this error sometimes happen. The only goods news is that the error will be cleared with no needed action next time the TRS19 launcher will be launched again.
So if you encounter this type of error, just quit your current session without saving anything, and close all TRS19 opened windows including content manager and initial launcher. Then just relaunch the TRS19 launcher, and then relaunch your session. there should be no longer an error while loading the libraries ...
Next EIT versions will have a new error message explaining how to clear it when this error is detected ...
Hope this helps.
Regards.
Pierre.