Ember app has been blocked by CORS policy

I was trying to use my api and I have a function on ember app to login but when the login action is trigerred I receive a message below. What is the reason I am receiving this error?

login:1 Access to fetch at 'https://app-dev.some-url.com.au/api/login' from origin
'http://localhost:4099' 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. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch 
the resource with CORS disabled.