Twitter feed not showing up *custom* the .json file is failing IMPORTANT

This is the website I maintain for work so its very important it gets fixed today!

My issue is my .Json file is shooting this out when it worked before without any change that im aware of. {"errors":[{"message":"Sorry, that page does not exist","code":34}]}

I used this website for reference

http://www.paulohsms.com/en/#/en/twitter-widget-sem-plugin/

So my website has the following codes

<ul id="twitter_update_list"><li>Tweet info here</li></ul>

HTML:

<script type="text/javascript" src="http://twitter.com/javascripts/blogger.js"></script>
<script type="text/javascript" src="http://twitter.com/statuses/user_timeline/USUARIO.json?callback=twitterCallback2&count=3"></script>
</body>

Code (markup):

Than the decoration of the css is the same (I didn't alter it because I wouldn't think that would affect the actual twitter feed.

#twitter_update_list {
	font-size: 13px;
	line-height: 21px;
	list-style: none;
	}
#twitter_update_list li {
	background: url('img/divisor.gif') bottom left repeat-x;
	padding-bottom: 7px;
	margin-bottom: 9px;
	}
#twitter_update_list span, {
	color: #444444;
	text-decoration: none;
	}
 
#twitter_update_list span a {
	color: #445566;
	}
 
#twitter_update_list span a:hover {
	color: #223344;
	}
 
#twitter_update_list a {
	color: #445566;
	}

Code (markup):

 

Just attempted a test page so it was from scratch with http://www.yourinspirationweb.com/en/how-can-i-embed-twitter-into-my-site/

And my .json page is still coming up

{"errors":[{"message":"Sorry, that page does not exist","code":34}]}

 

Please someone?