Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at ‘http://localhost:49892/notificationHub/negotiate’. (Reason: Credential is not supported if the CORS header ‘Access-Control-Allow-Origin’ is ‘*’) code example

Example: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://vtl-lab.com/VN/crecc-cms/api/member/register.json. (Reason: CORS request did not succeed).

Add below code when request API

header("Access-Control-Allow-Origin: *");