Software error:

syntax error at lib/CGI/Session.pm line 804, near "$plug qw(driver serializer id)"
Can't use global $1 in "my" at lib/CGI/Session.pm line 812, near "= $1"
Global symbol "%SUBDIR_FOR" requires explicit package name (did you forget to declare "my %SUBDIR_FOR"?) at lib/CGI/Session.pm line 815.
Global symbol "$self" requires explicit package name (did you forget to declare "my $self"?) at lib/CGI/Session.pm line 822.
syntax error at lib/CGI/Session.pm line 828, near "}"
Compilation failed in require at cart.cgi line 14.
BEGIN failed--compilation aborted at cart.cgi line 14.

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