Why use sipml5 don't call

I use xlift call sipml5. Asterisk console prompt.

– Executing [6002@from-internel:1] Answer(“SIP/2760-00000002”, “”) in new stack
> 0x7f7f100009b0 – Probation passed - setting RTP source address to
– Executing [6002@from-internel:2] Dial(“SIP/2760-00000002”, “sip/6002,120”) in new stack
== DTLS ECDH initialized (secp256r1), faster PFS enabled
== Using SIP RTP CoS mark 5
– Called sip/6002
– SIP/6002-00000003 is ringing
Got SIP response 603 “Failed to get local SDP” back from
– SIP/6002-00000003 is busy
== Everyone is busy/congested at this time (1:1/0/0)
– Executing [6002@from-internel:3] Hangup(“SIP/2760-00000002”, “”) in new stack
== Spawn extension (from-internel, 6002, 3) exited non-zero on ‘SIP/2760-00000002’

That SIP response is from SIPml5 so you would need to look at the browser to determine what is going on. The Javascript console may provide the needed information.

The Javascript console.But I don’t know what they mean

DOMException [InvalidSessionDescriptionError: "Failed to parse SDP: SDP Parse Error on line 17: Only one token in fingerprint attribute
code: 0
nsresult: 0x0] tsk_utils.js:128:9
tsk_utils_log_error() tsk_utils.js:128
tmedia_session_jsep01.onSetRemoteDescriptionError() tmedia_session_jsep.js:702

DOMException [InvalidStateError: "setRemoteDescription not called"
code: 11
nsresult: 0x8053000b] tsk_utils.js:128:9
tsk_utils_log_error() tsk_utils.js:128