PV Online connection fails on version 5.4
PV Online API url is now stored in the database instead of being a hard coded variable and i case you haven’t updated the releases sequensial the schema update may have failed, resulting in error when try to import PV Online data or use any PV Online services.
To fix this you need to update the database schema manually. Login to your database and run the query bellow
ALTER TABLE `settings` ADD `pv_online_api_url` VARCHAR(255) NOT NULL DEFAULT 'https://online.jbparfum.com/api.php' AFTER `mUnit`;
Remember to take a backup of your database first.