Good morning, I've been having a problem with the BrowserPrint SDK for a few days now. Until recently, my production web app was using the driver without any issues, but now I am receiving a CORS error from the browser. I haven't made any changes to the site. What could have happened? The error is: Access to XMLHttpRequest at 'http://127.0.0.1:9100/available' from origin 'https://mysite.it' has been blocked by CORS policy: Cannot parse Access-Control-Allow-Headers response header field in preflight response.

I don't have any problem in development when the origin is the same. 

The prompt to add permission in zebra browser print shows up and i have my site listed in the driver accepted sources.

any suggestion?