MESSENGER not working when on HTTPS

[float]

Hello,

I have MESSENGER html template working perfectly on 80, but can't make it work via HTTPS.
Tried this settings:
MESSENGER_HTTPS = 8887
MESSENGER_HTTPS_IN = 443,2083,2096 (also doesn't work when this is left empty)

Going to http://domain.com shows the block template, while https://domain.com timeouts.
I use latest CSF and latest cPanel 62.

Any ideas?

Thank you!

[postcd]

i do not know what is MESSENGER template, but try to make sure HTTPS is working on the server. Trying to pause CSF. Watching log file /var/log/lfd.log

[float]

HTTPS is indeed working on the server.
MESSENGER template is a HTML file (/etc/csf/messenger/index.html), that is used when users are blocked.

Thanks.