It looks like the announcement just removed the bottom to click. Leveling toons still gives points towards the event, you simply can’t see your progress. Don’t get the pitchforks and torches out just yet. Edit to add, you can get to the leaderboard via the news message, pictures showing this below. Credit to Troy and Asgard for finding this
Please spread the word in your line chats, region chats, etc, as an in game message will take time to put out. Thank you all for helping minimize this issue!!!