FacetWP’s indexer includes built-in resume functionality. It should resume automatically after a minute or two, assuming you keep the FacetWP settings screen open.

If your site is behind a .htpasswd login, the indexer might be blocked from resuming. In these cases, you’ll need to pass the access credentials to FacetWP.

If your site is hosted on WP Engine, try adding the following line to wp-config.php:

define( 'WPE_GOVERNOR', false );