WebGL Cannot load asset bundle over https

I'm trying to download an asset bundle from a WebGL build. It works fine in the editor.
When I'm using WebGL it throws a mixed content security error.

Code (CSharp):

1. UnityEngine.Networking.UnityWebRequest request
2.            = UnityEngine.Networking.UnityWebRequestAssetBundle.GetAssetBundle("https://myserver/etc", 0);
3.        yield return request.Send();

Even though the url starts with https:// when the error comes back in firefox it says something like
cannot download mixed content resource at http://myserver/etc. Why is it changing the https to http?

I turned off the mixed content security in firefox about:config and now it gives CORS security error again with the error at http://myserver/etc not https.

How do I get past the mixed content security error?

Also where should I put the asset bundles to avoid CORS problems on the same server?

Also I tried to switch to Addressables but having no luck there for other reasons which are in another post.

 

Turns out it was just a www causing the problem.
https://www.myserver.com did not work
and https://myserver.com did work no mixed content or CORS errors.
I'm assuming this was caused by some server redirect.