I have just had two customers who are unable to book because they cannot upload their profile picture. I had a pre approval from them which I approved and they still cannot book. Why is this. This has happened twice now.
If the guest is having a problem uploading a profile photo @Philip1958 then they need to call Airbnb and ask them to help them to resolve the issue.
There are all sorts of reasons guests can't upload a profile - they could perhaps not be very teccie? there could be a problem at Airbnb's end or it could be a bogus profile.
Just suggest the guests contact Airbnb and then you would be happy for them to come back and book.