Bug Description: After accepting the quest from "Slowhand Chara" and before leaving the city, if you talk to Chara again, you get the dialogue "Error: COMMENT_STRING variable has not been set before." Tested this with other NPCS that give quests and you try to talk to them again before completing the quest.
Once you leave the city, either by failing the quest, or completing the quest, once you talk to Chara again she will remark on the outcome of your last quest and the error dialogue will not appear.
How To Reproduce The Bug: In Diathma accept the quest, "Fencing Stolen Goods" from "Slowhand Chara"
How Often The Bug Occurs: Everytime
Quest Name: Fencing Stolen Goods
NPC Name: Slowhand Chara
Save Playtime(How long you've played that save/What day you're on): Day 3