can't offer any solution (yet) but I also tried loading your tour with Firefox and Opera. Firefox loaded to 100% then displayed a white screen. Opera also loaded the tour to 100% then proceeded to run the tour normally. So until a solution is found, I suggest demoing your tour with the Opera browser.
UPDATE: turns out that opera only run the tour once. after that it also crashed, however it did run ok on the Lunascape 6 browser. I would recommend sending your working files to EP support to investigate