Issue I am locked out of my server, please help me asap

[daxdax89]

Not sure what I did but I am locked out, I can access my server via ssh but I can't access my plesk via plesk login link.
I am seeing this error. Any idea how I can get access back via ssh? Thanks a lot in advance!

Screenshot

Captured with Lightshot

prnt.sc

 

[Bitpalast]

You need to use a browser that has never before accessed that page, because only on that browser, HSTS will not yet be in effect. Then first thing to do after you logged in is to go to Tools & Settings and create a new, valid SSL certificate for your host name.