Warning: include(DB.php): Failed to open stream: No such file or directory in /home/managedns/src/include.php on line 7

Warning: include(): Failed opening 'DB.php' for inclusion (include_path='.:/php/includes:/usr/local/lib/php:/usr/local/lib/php/pear:/home/managedns/libs:/usr/local/lib/php') in /home/managedns/src/include.php on line 7

Fatal error: Uncaught Error: Class "DB" not found in /home/managedns/src/include.php:10
Stack trace:
#0 /home/managedns/src/main.php(2): include()
#1 {main}
  thrown in /home/managedns/src/include.php on line 10