Recent PBXact module update has disabled pjsip registrations for Zulu client

Zulu clients were functioning as expected, until a recent update / upgrade of modules. Now Zulu clients do not receive incoming calls. Outgoing calls still function.

Asterisk CLI reports:

[2018-05-04 14:58:27] ERROR[8793]: res_pjsip.c:3858 endpt_send_request: Error 171060 ‘Unsupported transport (PJSIP_EUNSUPTRANSPORT)’ sending NOTIFY request to endpoint 90611

PBX Firmware:12.7.4-1804-2.sng7
PBX Service Pack:
Zulu :
Asterisk SIP :