Clicking the tournament link (when there is a listing) should open a window on your website with the bracket. If there is nobody in the bracket (0 participants), this will be blank. Is this what you’re experiencing?
Also, you mentioned you installed the latest version (1.1.0). Is this implying it was working just fine in the previous version (1.0.7)?
If I misunderstood your issue or the above hasn’t helped, please describe a bit more what you did to get to the issue and what you expect should happen instead.
Ok, nevermind… The cause I thought it was really doesn’t exist at all. My apologies.
It looks like your theme is loading it’s own copy of jQuery after WordPress loads its copy along with the Challonge jQuery plugin. Loading a second copy of jQuery overwrites the previously loaded copy unless one of them uses noConflict() to avoid this problem. This is more a problem with your theme than the Challonge plugin; you probably should discuss this further with your theme’s designers or choose a different theme.