Just upgraded moole from 1.9.4 to 2.7.14, upgrades seemed worked alright so far, except for when I try to open a lesson, it shows error.
Debugging info shows
Lesson
Error Accessing Lesson after Upgrade from 1.9.4 to 2.7
Cuộc thảo luận này đã bị khóa nên bạn không thể trả lời nó nữa.