This has happened to me now 3 times in a row, trying to do Narydlor's Herbalism quest.
I can take the quest, and gather everything, but when I go to turn in, I get :
"Script d2_efuqs_win, OID:8000ce88, Tag:Naryldor, ERROR: TOO MANY INSTRUCTIONS"
And it opens the 'asking for more information" conversation, rather then the turning in option.
Do you have a LOT of things in your inventory? Has anyone else had this issue?
Last time I was doing it a few weeks ago I never had any issues with it.