Error Accessing Lesson after Upgrade from 1.9.4 to 2.7 eftir Usman Asar - fríggjadagur, 1. juli 2016, 04:16 Number of replies: 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 Average of ratings: - Permalink Svara