CORS errors on BuildAPI calls

I now get CORS errors on all my BuildAPI calls, whereas I wasn’t yesterday. I know that the API is deprecated, but I thought the API server upgrade wasn’t going to affect users.

    "errors": [
            "code": "PX300",
            "status": "403",
            "title": "Cross-Origin Request Rejected",
            "detail": "You do not have permission to complete this request; please verify CORS headers."

Can you tell us the server address you’re hitting?
What client are you using, e.g. postman?
Can you also send us the headers you included in your request?

POST /v4/models/<MY_MODEL>/restart HTTP/1.1
Authorization: Basic <MY_API_TOKEN>
Cache-Control: no-cache
Postman-Token: d656c833-1d1e-1232-8753-63ec48530327
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW

Thanks @coverdriven for the information and reporting this.

Sorry, It looks like this is a side-effect from our earlier production release today. This should have been fixed now in Build API.

Thanks @kenny, all working now.