Hi Michel,
Thanks for reaching out.
Please check whether you are using the updated version of the extension i.e 2.7.7, which is recently available for update.
If you have already updated the extension and still getting the same issue, please add the following code to your wp-config.php for debug setup.
And please inform us of the issues which will help us to diagnose the problem.
// Enable WP_DEBUG mode
define( 'WP_DEBUG', true );
// Enable Debug logging to the /wp-content/debug.log file
define( 'WP_DEBUG_LOG', true );
// Disable display of errors and warnings
define( 'WP_DEBUG_DISPLAY', false );
//SET PHP INI DISPLAY ERROR FALSE
@ini_set( 'display_errors', 0 );
Please find the video will help you to edit wp-config.php and add the above code: https://www.youtube.com/watch?v=3SDPTafEM8o
Thanks