Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/consorcisigma/wp-content/plugins/wp-maximum-upload-file-size/inc/class-wmufs-i18n.php:11 Stack trace: #0 /var/www/consorcisigma/wp-content/plugins/wp-maximum-upload-file-size/inc/class-wmufs-i18n.php(29): Wmufs_I18n->__construct() #1 {main} thrown in /var/www/consorcisigma/wp-content/plugins/wp-maximum-upload-file-size/inc/class-wmufs-i18n.php on line 11