Warning: require_once(class/Db.class.php): Failed to open stream: No such file or directory in /home/.sites/820/site5912602/web/index.php on line 14

Fatal error: Uncaught Error: Failed opening required 'class/Db.class.php' (include_path='.:/opt/alt/php84/usr/share/pear:/opt/alt/php84/usr/share/php:/usr/share/pear:/usr/share/php') in /home/.sites/820/site5912602/web/index.php:14
Stack trace:
#0 {main}
  thrown in /home/.sites/820/site5912602/web/index.php on line 14