Class 'sfLoader' not found

I am getting these errors in the log. This causes 500 error and Kaltura video player is not showing and Kaltura admin page is also not opening. Throwing 500 error.

PHP Fatal error: Maximum execution time of 60 seconds exceeded in /kaltura/app/vendor/symfony/config/sfConfigCache.class.php on line 146, referer:

PHP Fatal error: Class ‘sfLoader’ not found in /kaltura/app/vendor/symfony/config/sfConfigCache.class.php on line 158

Please help to resolve this issue.