Up to 8 attachments (including images) can be used with a maximum of 1.0 MB each and 10.5 MB total.
Make sure you use correct format in Authorize url.
Also try putting following and check you are getting the code back in the url
It would have been better if you had provided your format here to get verified
Up to 10 attachments (including images) can be used with a maximum of 1.0 MB each and 10.5 MB total.
2 People are following this question.
Date Range question
SMS rate limit
After successfully making a new subscription, there is no webhook posted while the RingOut call is in progress
Message to Call Log Relationship
Sandbox vs Production weird behaviors Active Calls not available