Make sure that you have enabled moodle networking enrollments.
Site administration -> Courses -> Enrollments
Then choose "Moodle networking" and set "allow all courses" to Yes (under moodle networking settings)
Moodle networking (MNet)
fail to add peer
Cuộc thảo luận này đã bị khóa nên bạn không thể trả lời nó nữa.