Warning: require_once(./include/config.php): Failed to open stream: No such file or directory in /var/lib/sites/site-1052/www/html/index.php on line 2

Fatal error: Uncaught Error: Failed opening required './include/config.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/lib/sites/site-1052/www/html/index.php:2
Stack trace:
#0 {main}
  thrown in /var/lib/sites/site-1052/www/html/index.php on line 2