Laravel: Helpers class not found on live site. Works locally - php

Question

I am attempting to use the thujohn/twitter package to get a live twitter feed on my site.
I got it working on my local server by using the tutorial found here but when I uploaded the changes to my digital Ocean server, I got the error:
Symfony \ Component \ Debug \ Exception \ FatalErrorException
Class 'Helpers' not found
Here are the steps I took - not much code:
I downloaded the package with artisan
config/app.php: added 'Thujohn\Twitter\TwitterServiceProvider', to the providers and 'Twitter' => 'Thujohn\Twitter\TwitterFacade' to the aliases
added app_path().'/classes', to the start/global.php file
I added a Helpers class to classes/helpers.php, which contains:
public static function twitterFeed($screen_name='screenName', $count='1', $include_retweets='false', $exclude_replies='true')
{
$twitterfeed = Cache::remember('twitterfeed', 30, function() use ($screen_name, $count, $include_retweets, $exclude_replies) {
return Twitter::getUserTimeline(
array(
'screen_name' => $screen_name,
'count' => $count,
'include_rts' => $include_retweets,
'exclude_replies' => $exclude_replies
)
);
})
;
if(!empty($twitterfeed)) {
return $twitterfeed;
}
else {
return array();
}
}
Put a view::share in my route file:
View::share('tweets', Helpers::twitterFeed('contractrsherpa', '1', false, true));
then looped through it in my view.
Finally, ran composer dump-autoload.
Seems pretty straightforward and works great locally. I uploaded everything to my liver server, ran composer dump-autoload, but still get the error "class 'Helpers' not found."
Any idea what I need to do to get this to work on the live site?
TIA