On my 4th quest of today I had to get 4 items, bought them all, tried to turn in the quest, got the message "Oh No! You don't have all of the items! Make sure you have them all on hand." I check my inventory and refresh it and they are all in there. I try again, repeatedly. Buy them all a second time in case one isn't counting, still get the same error message. Refresh Blue Building page a couple of times, still no luck. Had to eventually give up on the quest. Think I can do the 5th quest, but it then tells me "You have already played the maximum of 5 times today!"

They weren't. And I just checked if my rank or points went up but they didn't either.

Thanks! I think I will try today's quests first so that if anything happens again I can leave the tab open and have something to show.

No problem now, everything went well. Puzzling, but good. Necessary to make a ticket or better to hold off on that until it actually goes wrong again, if it goes wrong again?