Oh no i never saw this message D: I haven't been as active recently but
I talk to them everyday, i never send them letters its not needed
if they ask for a fish, i give them one from the island, if they ask for a bug, a golden stag if they ask for furniture, customized rare furniture, if they ask for fruit, foreign perfect fruit
I do this about 5/6 times then on the next attempt, before handing over the item i save, and then i reset until they give me their pic, if they dont in a few goes, i do more errands and try again