Hi – it’s just a warning, no harm done. I’ll modify this code in the next version to check if the existing metadata is an array or a string (can be either and PHP behaves nicely regardless)

If you need this warning removed from your page, you should edit your wp-config.php file and use the following debug values:

define(‘WP_DEBUG’, true);

define(‘WP_DEBUG_LOG’, true);

define(‘WP_DEBUG_DISPLAY’, false);

That way, you still get error messages if you need them but they’re saved to wp-content/debug.log instead of displaying on screen.