Top scorer event disappeared

[Guido van den Berg]

Lian, you have not responded on PMs and in this thread for a day now. Are you planning to give more information?
A new top scorer event has started. I'm watching very closely at the screens. I may add screenshots later if I have the chance.

The home screen states: "Top Scorer Challenge" "In progress" and has a "View" button.
I click the View button. A pop up opens, but I do not get a "Join Challenge" button on the low-right corner of the screen. Instead, I see a Training button.

Now my question: how on earth do I join this event?

For those who wonder why I know about the "Join Challenge" button: I have two accounts. On my second account I got a "Join Challenge" button and I was able to join the event there. On my first account no button appeared.