Trouble connecting a websocket client


I have trouble connecting a websocket client (using JsSip) and a softphone (Blink) on Asterisk 11.2.1.
Both connect fine and show up in “sip show peers”, but cannot communicate.

The exact error message is: “ERROR[7101]: tcptls.c:446 ast_tcptls_client_start: Unable to connect SIP socket to Connection refused”, when the websocket client tries to call the Blink softphone…

Here are my configuration files:

Can you help me? Thanks.