I unable load my lightning component in a ligtning app page due to Cross-Origin Request error . I'm getting below mentioned error in the console

   Font from origin 'https://xxx-dev-ed.my.salesforce.com' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://xxx-dev-ed.lightning.force.com' is therefore not allowed access. The response had HTTP status code 404. 

So can any one please suggest me the right answer to fix this issue..