Hello everyone,
I've set up SMS provider for Twilio using this instructions:
https://docs.microsoft.com/en-us/dynamics365/marketing/real-time-marketing-outbound-text-messaging#add-a-sender-number-from-a-twilio-or-telesign-account
so, I have setup in D365:
and I've added two SMS numbers too ( the existing one and one that was purchased from Twilio - both from the UK +44 region).

Additionally, on Twilio side I did verification for two numbers (add them as a Verified Caller ID's) and Geo permissions for UK:


Now, when I try to sent a message (Test send or by using Journey in Real time marketing with a Static Segment and Contacts who are having those two numbers as a Mobile Phone) I have error:
Invalid sending parameters

Any help is welcome.
Thank you!