Twilio 1.12.0 not working with Appointments 4.4.7

[Valentina R]

Now everything works but with Twilio Version 1.11.2, but does not work with 1.12.0.

Reported here: https://bookingwp.com/forums/topic/appointment-booked-manually-from-the-backend/

[Željan Topić]

Could not reproduce the issues. SMS won't send when customer opts out or when customer does not supply Phone number.