Error including libraries: Can't use 'defined(@array)' (Maybe you should just omit the defined()?) at /kunden/homepages/0/d125879489/htdocs/at/cgi-bin/links/admin/db_utils.pl line 351.
Compilation failed in require at /kunden/homepages/0/d125879489/htdocs/at/cgi-bin/links/subscribe.cgi line 28.

Make sure they exist, permissions are set properly, and paths are set correctly.