- Rare crash bug fixed, when using constraints of type activities/teacher(s)/students (set)/room(s) occupy max sets of time slots from selection, teacher(s)/students (set)/room(s) max activity tags per day/real day/week from set, or activities max activity tags from set in selected time slots, if the maximum allowed number of sets of time slots or tags from set was above 2 (reported by Yush Yuen).