Observe: a 500 error (after you've been told that the SMS has been sent)
Outcome
What did you expect?
The add phone number UX should be suppressed when there is no identity server.
Really, the "SMS has been sent" confirmation should be conditional on a 200 from the identity server send SMS request, not just included as part of the local echo.
Steps to reproduce
Outcome
What did you expect?
What happened instead?
500
Operating system
All of them
Browser information
Firefox Nightly
URL for webapp
app.element.io
Application version
Latest
Homeserver
matrix.org
Will you send logs?
No