How to make changes in CORS in thingworx platform?

Hi 

i have some api's in thingworx like https:/XXXXX/Thingworx/Things/ABCThing/Properties/Refiner . i integrated this url with unity 3d model and when i try to run unity 3d it throws an error "Access to XMLHttpRequest at 'XXXXXX/Thingworx/Things/ABCThing/Properties/Refiner' from origin 'http://XXXXXXX.amazonaws.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource."  Let me know what is the resolution on this....i refer some links but not work for me

Let me know how to resolve this error.