Just now (14:20 EST on 2019/02/11), I was able to access and perform Vvardenfell World Boss and Delve daily quests... but received no "Morrowind Celebration" event tickets when I turned in the quests.
Given the lack of any response and the impossibility of using the ticket system for defects like this in the past, I am of the opinion there is no utility in attempting to report this to ZOS. I report it here so that other users will know the event may in fact be "broken". I will assume event ticket rewards are simply lost for today, and try again tomorrow.