Issue First login bug

[Tibor Bokor]

Hi all!

I try plesk panel. Install Debian 9 system.
All time perfect step.
And first login.. No display login page... :O

Error message:

"The site is unable to provide a secure connection
Vps2.hu does not meet security standards.

ERR_SSL_SERVER_CERT_BAD_FORMAT"

What is problem? And howto fix?
This domain record is perfect (domain register).

Thank you !