twitter-bootstrap http-status-code-403 microsoft-edge
66 Edge errors: HTTP403 FORBIDDEN

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/normalize.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/print.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/dist/css/bootstrap.css

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/glyphicons.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/scaffolding.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/vendor-prefixes.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/image.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/tab-focus.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/type.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/background-variant.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/text-emphasis.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/text-overflow.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/code.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/grid.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/grid.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/grid-framework.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/tables.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/table-row.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/forms.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/forms.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/buttons.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/opacity.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/buttons.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/dropdowns.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/nav-divider.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/reset-filter.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/button-groups.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/border-radius.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/input-groups.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/navs.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/navbar.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/component-animations.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/nav-vertical-align.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/breadcrumbs.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/utilities.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/pagination.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/pagination.less
HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/pager.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/labels.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/labels.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/badges.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/jumbotron.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/alerts.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/thumbnails.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/alerts.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/progress-bars.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/gradients.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/progress-bar.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/media.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/list-group.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/panels.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/list-group.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/panels.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/responsive-embed.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/wells.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/close.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/modals.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/tooltip.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/reset-text.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/popovers.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/carousel.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/clearfix.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/center-block.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/hide-text.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/responsive-utilities.less

HTTP403: FORBIDDEN - The server understood the request, but is refusing to fulfill it.
(XHR): GET - https://netdna.bootstrapcdn.com/bootstrap/3.3.6/css/less/mixins/responsive-visibility.less
66 very interesting errors in Edge browser, other browsers don't have this problem. Im not sure what triggers it and everything is about Bootstrap.
Errorcode from Microsoft console errors table:
HTTP403 - FORBIDDEN - The server understood the request, but is refusing to fulfill it.
What's going on? What could cause this?
Update

As some of you kind people pointed out, Bootstrap CDN does not have .less which seems to be the problem in here.
But.. Im not using .less, only pure CSS. I checked all my includes and main.css that loads 3rd party stylesheets and there's no reference to .less at all.
Solution
This is because the LESS files are not available in the CDN.
Maybe other browsers manage to hide this error ?
Here is the result in chrome for instance :
Be sure to only use the CSS and JS files from bootstrap or host the less versions yourself. :)