After fault with SBG1 I purchased a new VPS with Debian 10 + Plesk. Cannot connect to SSH using "debian" login and password from email. I tried to reinstall VPS with Debian and no Plesk - the same result - "Access denied" in Terminal. Earlier I had no problem with SSH - it worked with with "root" login.
I can log into my new debian VPS (GRA) with "debian".