Horbe/webmail is not working in plesk

Error when trying to connect to http://webmail.domain.tld/

A fatal error has occurred DB Error: connect failed Details have been logged for the administrator.

#  cat /etc/psa/.psa.shadow > etc/psa/.webmail.shadow

# chown apache.apache /etc/psa/.webmail.shadow

# chmod 600 /etc/psa/.webmail.shadow

You may have a problem with your file:

# /etc/psa/.webmail.shadow