Live chat is not functioning - SDP 9.3 Build 9332

Live chat is not functioning - SDP 9.3 Build 9332

Hi experts,

My live chat is not functioning. I have configured the settings as per link below:
https://help.servicedeskplus.com/configurations/helpdesk/configuring_chat_settings.html

During testing, online technicians didn't get messages sent to support group by requester. The messages became missed chat as seen in chat settings by Administrator.

Is there any pre-requisite steps need to be done such as open firewall port etc?

Kindly help ASAP as I need to do demo to our users next week.
Looking forward for your reply.

Thanks & regrads,
Adilah.

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