Hello guys, i still don’t know why the Breeze plugin shows this error but i was being able to make it work adding some lines of code on line 315 right after the openning of the function write_config() in the inc/cache/config-cache.php file
if ( empty( $wp_filesystem ) ) {
require_once( ABSPATH . '/wp-admin/includes/file.php' );
WP_Filesystem();
}
This fix helped me to make the plugin works, but don’t really understand why stopped working in the first place.