Hi, after install appears this message, can help me please? thanks

Warning: require_once(/home/xxx/domains/xxx.com/public_html/joomla/components/com_k2/controllers/default.php) [function.require-once]: failed to open stream: No such file or directory in /home/espanyah/domains/xxx.com/public_html/joomla/components/com_k2/k2.php on line 40

Fatal error: require_once() [function.require]: Failed opening required '/home/xxx/domains/xxx.com/public_html/joomla/components/com_k2/controllers/default.php' (include_path='.:/usr/local/lib/php') in /home/xxx/domains/xxx.com/public_html/joomla/components/com_k2/k2.php on line 40