Is anyone getting this from quests when you turn in an item,I am getting the sp /item. Oh No! You aren't on a quest
Happened to me a few times but that has been months ago so I thought it got fixed at some point. Which browser are you using and is it possible that you accidentally double-clicked on the button to finish the quest or that your mouse is set to perform double-clicks when you actually only click once?
Are you also making sure you're going back to the right npc? With this new "see other quests" button I'm finding I'll click too far back and try to take a wiz quest to pete or a nori quest to maleria.
FINALLY GOT THE 15K WARDROBE DONE!!!!! Next up gutting and selling it.
I still get this error sometimes, but it's not much of one. The item reward from the quest is in my Inventory and the sP reward is added to my pocket. It just doesn't tell me what the reward is and gives me the error instead of telling me. If I want to know I have to go and look.