An example in swish.cgi says:

#       # Example config file -- returns a hash reference
#       {
#           title           => 'Search Our Site',
#           swish_index     => 'index.web',
#
#           template => {
#            package         => 'SWISH::TemplateToolkit',
#            file            => 'search.tt',
#            options         => {
#                INCLUDE_PATH    => '/home/user/swish-e/example',
#            },
#       };

I think there is a line missing:

#       # Example config file -- returns a hash reference
#       {
#           title           => 'Search Our Site',
#           swish_index     => 'index.web',
#
#           template => {
#            package         => 'SWISH::TemplateToolkit',
#            file            => 'search.tt',
#            options         => {
#                INCLUDE_PATH    => '/home/user/swish-e/example',
#            },
#           },		<------
#       };

-r