Hi @Ramr-msft
After few tries, I was able to successfully create the custom models over the weekend (attached), but as you can see in the screen shots from the prior post:
First and Second screen shots - It shows "Operation returned an invalid status code 'Bad request'", though I selected SouthCentralUS, which is a supported region. Why did it throw this error and the error message is not helpful at all to troubleshoot further.
Third Screen shot - I selected WestUS2, which is not a supported region. In this case the error message says, "Selected resource doesn't support,,,,, etc" but I think the error message should say, "selected resource is not supported in this location", or something like that as it would be more specific, because I had to do lot of research and finally was able to identify that I was picking a non-supported region.
Thanks,
Ravi