Q:

Less.js not parsing .less files

I have tried everything and this makes absolutely no sense! I previously had Less.js working just fine on my site, then I decided to use WP_Less because of some of its added features but then ran into issues when implementing BuddyPress. VERY long story (and day) short I am trying to get back to the basics and I can't seem to get Less.js to just work. I've turned off all plugins and removed all the code except what is in the header so there should be no outside conflicts
the header.php has this code:
<link rel="stylesheet" type="text/css" media="all" href="<?php get_bloginfo( 'stylesheet_directory' );?>/style.css" /> <!-- WP Theme Style -->
<link rel="stylesheet" type="text/css" media="all" href="<?php get_bloginfo( 'stylesheet_directory' );?>/style.css" /> <!-- Theme Less Styles -->
<link rel="stylesheet/less" type="text/css" href="<?php get_bloginfo( 'stylesheet_directory' );?>/css/less/style.less" /> <!-- Style.JS -->

This results in only the the less.js and the default style.css loading no style.less:
If I modify the style.less call to this:
<link rel="stylesheet" type="text/less" href="<?php get_bloginfo( 'stylesheet_directory' );?>/css/less/style.less" />

then they all load but the style.less does not get parsed: 
Nothing I have tried down to its simplest form based on their documentation has worked and I simply don't understand why, I've set this up on other sites with no issues before.
If anyone can help you thank you SO MUCH, this is time sensitive and very urgent right now.

A:

In my case, LESS was silently failing due to parsing errors.
In order to debug less.js, open javascript console in your browser (i.e. F12) and type:
less.env = "development";
less.refresh();

I've filed a report to less.js project, so they could fix this.

