Notice: Only variable references should be returned by reference in /var/www/html/archive_old/wp-content/plugins/w3-total-cache/inc/define.php on line 1216

Fatal error: Uncaught Error: Call to a member function process() on bool in /var/www/html/archive_old/wp-content/advanced-cache.php:24 Stack trace: #0 /var/www/html/archive_old/wp-settings.php(62): include() #1 /var/www/html/archive_old/wp-config.php(90): require_once('/var/www/html/a...') #2 /var/www/html/archive_old/wp-load.php(29): require_once('/var/www/html/a...') #3 /var/www/html/archive_old/wp-blog-header.php(12): require_once('/var/www/html/a...') #4 /var/www/html/archive_old/index.php(17): require('/var/www/html/a...') #5 {main} thrown in /var/www/html/archive_old/wp-content/advanced-cache.php on line 24