Your invitation to start viewing webcam was not sent because (my friend) is not on your allow list.
Messenger is not available right now. Please try again later. (0x80ee00c8)
About the first problem (invitation to view the camera):
Just add the contact to allowed
About the second problem (video and audio calls):
Escargot currently does not support calls, but it may soon be added. (I do not know when)