I used Firefox on your working www. domain, accepted the faulty certificate and came to the login page, so it should work.

Did you reply in the wrong thread ?
I think either your SSL-certificate or subdomain is wrongly configured, depending on what you want to acheive. They are not consistent so you get an error for missing site or invalid cert depending on subdomain.

can't access to dashboard to change any of the configurations

Can you ping your IP address? If so, do you have Putty installed on your remote work station? Access your shell command prompt from a terminal as root and do

systemctl status webconfig.service

and also

systemctl status httpd.service

and see if they're running. You can do

systemctl restart httpd.service

and/or and

systemctl restart webconfig.service

. You'll have to check your logs under /var/log/httpd and var/log/webconfig, respectively for indicators if either service isn't starting. WinSCP is your friend to do this.

using firefox worked. strange that chrome fails.

thanks for the assist. I can get in with firefox

Is this still a problem? If so, how are you entering the url?