How to decipher

I received the following challenge as a homework problem. Not much info is provided with it, except for the word Decrypt! at the end.

This problem is online on a password protected school site. So I cannot post the link. (No-one without an account would be able access it.)

This is for a course based on cryptography/network security

A hint I received said that I should look into the html code. Which is pasted below. I noticed the “nbsp;” tag repeats quite often, and exactly 57 times, which is also the name of this challenge in the URL code ie.. www.website.com/challenge/#57.html

So based on the hint to look into the html and the #57 in the url I believe it is possible this &nbsp tags are what to focus on.

Any help or clues on how to solve this would be appreciated.