Warning: require_once(./pgs/rstcodes.php): Failed to open stream: No such file or directory in /var/www/html/index.php on line 120

Fatal error: Uncaught Error: Failed opening required './pgs/rstcodes.php' (include_path='.:/usr/local/lib/php') in /var/www/html/index.php:120 Stack trace: #0 {main} thrown in /var/www/html/index.php on line 120