Suddenly stopped working

Hi!
LOVE this plugin! I use it on one of our clients pages, http://www.rehabakademin.se or the pages http://www.rehabakademin.se/smarttest and http://www.rehabakademin.se/utmattningstest but recently both quizzes stopped working. When I click the button to start the test, nothing happens…
Please help!

Best regards, Emma