Hi Ivan,
There may be an issue with the number you used for 2FA. Refer to the following article for details on how to update your 2FA number: How do I update my 2FA phone number in the Sinch customer dashboard?
The following article details how to invite users to the customer dashboard: How do I invite another user to my Sinch Customer Dashboard account?
If after reviewing the above information you are still experiencing issues, then please contact the Sinch Support team, by either:
Logging a support ticket on our Customer Ticketing Portal
Email: support@sinch.com.
Thanks and kind regards,
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