If you don't have the permissions to backup userdata the course copy ui prints an error.

Steps to reproduce

1. Go to edit the role "Manager" and unset the permissions "moodle/backup:userinfo" and "moodle/restore:userinfo".
2. Assign a user to this role in a course category context.
3. Login as the manager.
4. Go into a course inside the category where this user is assigned as manager.
5. Choose from the course menu the item "Copy course".
6. Notice: there is no checkbox to include userdata!
7. Fill out all form elements and click on the button "Copy and view"
8. You get an error message "error/copy_class_field_not_found".

The reason for this error is the missing value "userdata" which is not defined in the moodleform if the capability are not sufficiant.

If you add a hidden field in this case the error message is not showing up anymore but now the adhoc task stucks with the error "error/setting_locked_by_permission".

This happens because the asynchronous_copy_task tries to set the value "0" to the backup_setting "user" which is not allowed.

If you change the code in the asynchronous_copy_task in the way that the value "1" is set if $copyinfo->userdata is true, then the copy task runs to the end.