@esolano: Yes, I am using display: none on line 70 - that is to hide the profile temporarily until the javascript loads to avoid the hidden section appearing then disappearing once the javascript has loaded.
If the javascript does not load for some reason (user has it turned off, etc.), the profile form will stay hidden.
Also, if you have installed the plugin somewhere other than /wp-content/plugins/ folder (such as the /wp-content/mu-plugins/ folder on a multisite install), the path to the javascript on line 71 will be incorrect, causing it not to load.
@estebansp: What was the other plugin that you changed?
Also, are you two working on the same project together, or are both usernames for the same person?