Sorry for the trouble, there is a security setting that was added for Safari 11 that restricts local files. If you are using Safari 11 this might help:
1. Go to Safari Preferences->Advanced tab. Turn on the "Show develop menu in menu bar" checkbox (at the bottom).
2. In the Safari Develop menu, choose "Disable local file restrictions". This will allow the local panorama to be viewed from the index.html file.