Response for preflight has invalid HTTP status code 400

[jacovanc]

Originally got this error when trying to connect to the iota proxy from javascript:

Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. The response had HTTP status code 400. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

Then after installing Allow-Control-Allow-Origin for chrome (after some googling), the error changes to:

Response for preflight has invalid HTTP status code 400

[stevendeboer]

I'm having the same issue right now. Has anyone found a solution for this?