Unable to open database.
Error message:

PDOException: SQLSTATE[HY000] [2002] Connection refused in /srv/users/serverpilot/apps/realhound/public/wp-content/plugins/realhound_marketplace/includes/app/models/rmModel.class.php:24 Stack trace: #0 /srv/users/serverpilot/apps/realhound/public/wp-content/plugins/realhound_marketplace/includes/app/models/rmModel.class.php(24): PDO->__construct('mysql:host=165....', 'rhClassicData', 'W@terV1ew') #1 /srv/users/serverpilot/apps/realhound/public/wp-content/plugins/realhound_marketplace/includes/app/rmRewrites.class.php(110): rmModel->__construct() #2 /srv/users/serverpilot/apps/realhound/public/wp-includes/class-wp-hook.php(292): rmRewrites->parse_request(Object(WP)) #3 /srv/users/serverpilot/apps/realhound/public/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array) #4 /srv/users/serverpilot/apps/realhound/public/wp-includes/plugin.php(551): WP_Hook->do_action(Array) #5 /srv/users/serverpilot/apps/realhound/public/wp-includes/class-wp.php(763): do_action_ref_array('wp', Array) #6 /srv/users/serverpilot/apps/realhound/public/wp-includes/functions.php(1291): WP->main('') #7 /srv/users/serverpilot/apps/realhound/public/wp-blog-header.php(16): wp() #8 /srv/users/serverpilot/apps/realhound/public/index.php(17): require('/srv/users/serv...') #9 {main}.