Thank you for your reply. The system was working fine for more than a week, I used to login everyday to check status and logs from ISPConfig interface. This started yesterday suddenly.
I can't login to http interface too.
Btw, after reboot the SSL error above shows for a while, then after that the error doesn't show again and the page keeps loading for a while until it says:
"The connection to breezee.com:8080 was interrupted while the page was loading."
When the SSL error is showing and I try http://breezee.com:8080
it tells me that I can't use a proxy or something like that, but when the ssl error is not showing and it's taking a while to load then the http page takes a while to load without any output too.
I'm using the same SSL certificate for the site and for ISPconfig, if you go to https://breezee.com
everything works fire and you can see the certificate data. Shouldn't that mean that the SSL certificate is working fine ?