I use ZoiPer 3 Biz.
I want to use Presence and Chat. I have configured the SIP account in ZoiPer as explained here: https://www.zoiper.com/en/support/home/article/165/Chat_and_Presence_with_Zoiper3.
But on each status change Asterisk says:
res_pjsip_pubsub.c:3374 pubsub_on_rx_publish_request: No registered publish handler for event presence
res_pjsip_pubsub.c:776 subscription_get_handler_from_rdata: No registered subscribe handler for event presence.winfo
And also I cannot chat, because there is no one online.
In ZoiPer 3 I can use XMPP. For chat this works, but not for presence. But I don't want tu use XMPP, in ZoiPer 5 there is no XMPP support anymore.