JavaScript - XMLHttpRequest, Access-Control-Allow-Origin errors

Question

I\'m attempting to send a XMLHttpRequest to a paste site. I\'m sending an object containing all the fields that the api requires, but I keep getting this issue. I have read

Answer 1

I've gotten same problem. The servers logs showed:

DEBUG: <-- origin: null

I've investigated that and it occurred that this is not populated when I've been calling from file from local drive. When I've copied file to the server and used it from server - the request worked perfectly fine