Unable to play Unity web player file embedded in Squarespace page? Will not load?

Alright, I have built my project for web and have followed several tutorials including this: http://synersteel.com/blog/2015/5/12/unity3d-hosting-a-web-build-on-squarespace-using-dropbox to embed the Unity web player in my squarespace web page.

I have hosted Unity 3D file in dropbox and changed the link after u.initPlugin in my HTML file. I did everything as instructed but when I load my web page I get this: 

This is frustrating as it will not load (the line will not go across). How can I fix this? I need to share my Unity project publicly with a link by tomorrow.