Deleting the existing letter did allow me to loot a new one and proceed with the quest. Just a cosmetic issue, but I saw that the Vial of Mysterious Liquid from Minisa is a parchment icon (looks exactly like the Astronomer's Letter).Originally Posted by AmonGwareth
Still have the same problem with completing the quest, Minisia only gives 1 vial and the quest text and counter require you to use it in 5 places. (But I didn't see in the patch notes that this was corrected).