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Warning: require_once(/lib/setup.php): Failed to open stream: No such file or directory in /var/www/moodle/config.php on line 41

Fatal error: Uncaught Error: Failed opening required '/lib/setup.php' (include_path='.:/usr/local/lib/php') in /var/www/moodle/config.php:41 Stack trace: #0 /var/www/moodle/public/config.php(31): require_once() #1 /var/www/moodle/public/index.php(30): require_once('/var/www/moodle...') #2 {main} thrown in /var/www/moodle/config.php on line 41