Why am I Getting an Error in the Incoming Phone Number Dropdown After Successfully Integrating my API info with Twilio SMS?

[user-1]

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I’m trying to integrate against my Twilio SMS. I’ve put in my API info, keys, etc, (the test connection succeeded) but in the Incoming Phone Number dropdown I’m getting this error:

[user-1]

I have an active number in Twilio here

[user-1]

Hi , may I ask what kind (Main or Standard) of API Key you have created?

We’ve tested with Main type (1st image) and it works correctly (2nd image)