volgens Helen Foster.
Hi Alexander,
To ensure a successful restore of your course backup, you need to make sure that the version of Moodle you are restoring the course to is the same, or newer, than the one the course was backed up on.
The version of Moodle which your site is using can be found if you login as an administrator and go to Settings > Site administration > Notifications. It should be exactly the same in your Moodlerooms Moodle site.