Fatal error: Uncaught Error: Call to undefined function WP_Optimize() in /customers/5/8/9/thesufi.com/httpd.www/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php:1180
Stack trace:
#0 /customers/5/8/9/thesufi.com/httpd.www/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php(1158): wpo_delete_files('/customers/5/8/...')
#1 /customers/5/8/9/thesufi.com/httpd.www/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php(651): wpo_delete_files('/customers/5/8/...')
#2 /customers/5/8/9/thesufi.com/httpd.www/wp-content/plugins/wp-optimize/cache/file-based-page-cache.php(140): wpo_serve_cache()
#3 /customers/5/8/9/thesufi.com/httpd.www/wp-content/advanced-cache.php(63): include_once('/customers/5/8/...')
#4 /customers/5/8/9/thesufi.com/httpd.www/wp-settings.php(96): include('/customers/5/8/...')
#5 /customers/5/8/9/thesufi.com/httpd.www/wp-config.php(81): require_once('/customers/5/8/...')
#6 /customers/5/8/9/thesufi.com/httpd.www/wp-load.php(50): require_once('/customers/5/8/...')
#7 /customers/5/8/9/thesufi.com/httpd.www/wp-blog-header.php(13): require_once('/customers/5/8/...')
#8 /customers/5/8/9/thesufi.com/httpd.www/index.php(17): require('/customers/5/8/...')
#9 {main}
  thrown in /customers/5/8/9/thesufi.com/httpd.www/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php on line 1180