Properly handle is log path is set to null
Properly handle is log path is set to null

PHLF/rasa_nlu,RasaHQ/rasa_nlu,PHLF/rasa_nlu,beeva-fernandocerezal/rasa_nlu,RasaHQ/rasa_nlu,RasaHQ/rasa_nlu,beeva-fernandocerezal/rasa_nlu