Warning: require_once(sites/all/modules/contrib/cache/lock.inc): failed to open stream: No such file or directory in /var/www/html/mdm/includes/bootstrap.inc on line 1165

Fatal error: require_once(): Failed opening required 'sites/all/modules/contrib/cache/lock.inc' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/mdm/includes/bootstrap.inc on line 1165