Geo Mashup search widget error

Hello,

We’ve been using your plugin for a good number of years for a non-profit. However, the Geo Mashup search widget has recently started returning the returning the following error message, and we don’t understand why?:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘GeoMashup\Hooks\SearchResults’ does not have a method ‘filter_the_content’ in /var/sites/q/quietgarden.org/public_html/wp-includes/class-wp-hook.php on line 287

Could you help us out?

Matt

The page I need help with: [log in to see the link]