Issues connecting Wio Terminal to Azure IoT C

I am trying to connect my wio terminal to Azure iot central but it does not work.
After inputing the information on SSID network, password and az_iotc, I receive the below error message:
buf =, size - len(read))
OSError: [Errno 6] Device not configured
When I reset the wio terminal I only see on the screen:
connecting to SSID: <[my SSID NUMBER]>
I am using a mac os Mojave 10.14
I followed all the instructions on how to connect to Azure IoT central (updating RT8720 firmware, setting up wifi via Arduino, building ap in Azure Iot Central)
Can you help me? Thank you