P315 not working after upgrading to 16

After upgrading from v15 to v16, my Sangoma P315 phone registers but won’t send and receive calls. I’ve enabled and configured DPMA management. S406 works just fine. What am I missing?

Looks like these settings need to be changed under the extension > Advanced tab:
a. Enable WebRTC defaults: Yes
b.Media Encryption: SRTP via in-SDP (recommended)
c.Allow Non-Encrypted Media (Opportunistic SRTP): No

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