hrm...interesting. I had a few people try it out without issues. What browser and OS are you running? i assume no errors pop up?
So... super weird, but I tried again on my personal laptop (same browser, Chrome) but didn't have this issue again. I was playing last night on a work computer (DON'T TELL ANYONE!!) so I'm wondering if something was trying to block it from working?
I'll see if I can look into it next time I'm at work, unless Ravery is able to help :)