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So I was wondering why I was getting the following responses back (404/403) when using Twitter Bootstrap Alpha 4.0 from either MaxCDN or CDNjs in the Microsoft Edge browser.

enter image description here

Other notes:
– This only happens in MS Edge, all other modern browsers don’t return this
– This only seems to happen with the CSS files, not the Bootstrap JS
– This happens both locally and when published

I am simply loading it in the <head> as usual:

<link href="//" rel="stylesheet" type="text/css" />


There is also a post discussing this same issue here:
66 Edge errors: HTTP403 FORBIDDEN



  1. In testing this myself I could not get it to work in any browser unless I changed it to HTTPS . Using the following code worked in all browsers for me

    <link href="" rel="stylesheet" type="text/css" />
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  2. As long as there is no fix, you can use 3.3.5 which (as opposed to the current 3.3.6) doesn’t have that bug.

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