Did you check the hints:
URLs are case sensitive, make sure your uploaded files and folders are linked with exactly the same case as they are named.
Make sure that permissions for uploaded files are rw-rw-r– (or 664) and for uploaded folders: rwxrwxr-x (or 775).
Add /index.html to the end of your url if you see error 500.
fidget/spinner looks wrong, are you sure that is not "fidget spinner" (which would need to be URL encoded to handle the space letter)?