I'm getting an error when I try to open a restored course. The course was created on a different system, and I've imported it to my current 2.7 system. The error is:
Warning: require(/usr/share/moodle/course/format/site/format.php): failed to open stream: No such file or directory in/usr/share/moodle/course/view.php on line 281
Fatal error: require(): Failed opening required '/usr/share/moodle/course/format/site/format.php' (include_path='/usr/share/moodle/lib/zend:/usr/share/moodle/lib/pear:.:/usr/share/php:/usr/share/pear') in/usr/share/moodle/course/view.php on line 281
The backup was created in 2.8, but my server is running 2.7. Could this be the problem?