Fatal error: Cannot redeclare Clue\StreamFilter\append() (previously declared in /var/www/wp-content/mu-plugins/gd-system-plugin/plugins/mwc-core/vendor/clue/stream-filter/src/functions.php:105) in /var/www/wp-content/plugins/wp-mailerlite-lite/includes/vendor/clue/stream-filter/src/functions.php on line 27