Error Accessing Lesson after Upgrade from 1.9.4 to 2.7 ໂດຍ Usman Asar - ວັນສຸກ, 1 ກໍລະກົດ 2016, 4:16 ໂມງເຊົ້າ ຈຳນວນການຕອບກັບ: 0 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 ການຈັດອັນດັບສະເລ່ຍ: - ລິ້ງຖາວອນ ຕອບກັບ