Linphone sip doesn't work with jami?

I’m trying to connect to linphone via jami (Linux Mint). I added my username (my plain username without anything additionally) and password correctly, and I use this for server and proxy: sip:sip.linphone.org;transport=tls

TLS stuff are ON in the settings.

And yet, jami can never make a call out to anything (not even to 4443), and it always says “missed outgoing call”.

Any clues as to what is going on?