I have examined your tour and found that the applet can not find folder Scene.
First, please make sure that you have uploaded all the files, including the folder "Scene".
Second, please make sure that all the files are put in the same directory. The folder "Scene" should be under the same directory with . html file.
Third, please make sure that there is no space between the letters or unusual letters in the filename. For example, my tour.html is the wrong name, while mytour.html is the correct name. And to name files in English is preferred.