[mdf_force_searching]

Use this special shortcode in your site wp theme header.php (on the same bottom of the file) when you sure for 100% that you did all options right, but filtering still doesn work.

Example:

Read also: https://wp-filter.com/howto/options-well-result-page-shows-results/