A fatal error has occured:

Can't use 'defined(%hash)' (Maybe you should just omit the defined()?) at /var/www/vhosts/download-tipp.de/httpdocs/public_html/cgi-bin/admin/GT/SQL/Base.pm line 579.
Compilation failed in require at /var/www/vhosts/download-tipp.de/httpdocs/public_html/cgi-bin/admin/GT/SQL.pm line 19.
BEGIN failed--compilation aborted at /var/www/vhosts/download-tipp.de/httpdocs/public_html/cgi-bin/admin/GT/SQL.pm line 19.
Compilation failed in require at /var/www/vhosts/download-tipp.de/httpdocs/public_html/cgi-bin/admin/Links.pm line 509.

Please enable debugging in setup for more details.