I've just checked it and it works for me. It might just be that there are no events in your categories. Look at the bottom left hand side and it'll show you the number of events. If it says "0" then try another month to make sure it is responding ok.
I'm not sure, sorry. I volunteered at the summer event, so got a free entry for Dec. Try messaging them - they were a super friendly team from a local club rather than a big event organising company.
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