To provision this number you must supply the Bundle with End-User information and Supporting Documents to comply with local telecom regulations.
Previously the IncomingPhoneNumbers API would let you provision the phone number without providing a Bundle, however, you are now required to pass in a BundleSid that satisfies the requirement for the phone number. This is because Twilio needs to know which Bundle containing End-User information and Supporting Documents will be assigned to the phone number to meet regulatory requirements for that country and type of phone number.