COM Port not available

#1

Hi,
I want to connect a M5Stack (Esp32) to Azure IoT Hub.
I installed the Driver and the port are available, but if I want to select them, an Error occured.COMError

Does anybody know whats the correct way to do it?

“Zugriff verweigert” means Access denied

#2

“Access denied” means the port is already used by an application.