[pjsip] Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006]

[Maya Zalcberg]

Hi Samuel,
Once again, thank you so much for your gr8 work!
I fixed the  the issues with the audio-dev, and now my audio device can be
found.
I don't get that error anymore, but a new problem came out...  the app now
crashes when trying to make a call, or to receive one: "Assertion failed: (b
&& frame), function pjmedia_delay_buf_get, file ../src/pjmedia/delaybuf.c,
line 317."

This is the log from an incoming call:

04:18:14.677  pjsua_media.c  Opening sound device PCM at 16000/1/20ms
 04:18:14.725     ec0x243640  Echo suppressor created, clock_rate=16000,
channel=1, samples per frame=320, tail length=200 ms, latency=2 ms
 04:18:15.031   conference.c  Port 2 (ring) transmitting to port 0 (IPHONE)
 04:18:15.038    pjsua_client.c  Incoming call for account 2!
From: "a 1" <sip:0722511898 at 072.012.net <sip%3A0722511898 at 072.012.net>
;user=phone>
To: "a 1" <sip:722511874 at 072.012.net <sip%3A722511874 at 072.012.net>>
Assertion failed: (b && frame), function pjmedia_delay_buf_get, file
../src/pjmedia/delaybuf.c, line 317.

Do you know what might be the problem?

Regards,
Maya
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