--- a/MqttMonitor/MqttClient.py Tue Apr 07 19:30:53 2020 +0200 +++ b/MqttMonitor/MqttClient.py Wed Apr 08 18:06:19 2020 +0200 @@ -239,8 +239,10 @@ self.__mqttClient.tls_set(ca_certs=caCerts, certfile=certFile, keyfile=keyFile) return True, "" - except ValueError as err: + except (ValueError, FileNotFoundError) as err: return False, str(err) + + return False, "unspecific error occurred" def startLoop(self): """