SwaggerHub API执行失败,本地主机出现403错误

I am trying to test my API documentation using openapi: 3.0.1 format. When trying to execute the endpoints from SwaggerHub documentation, I get the 403 error with the following headers:

 content-length: 0 
 date: Thu, 11 Oct 2018 04:28:28 GMT 
 server: nginx/1.8.0 + Phusion Passenger 5.0.22 
 status: 403 Forbidden 
 x-powered-by: Express, Phusion Passenger 5.0.22 

The issue is both for Safari as well as Chrome browsers.

I have also enabled CORS for my golang application as per the following snippet:

allowedOrigins := handlers.AllowedOrigins([]string{"*"})
allowedHeaders := handlers.AllowedHeaders([]string{"X-Requested-With", "Content-Type", "Authorization", "Accept"})
allowedMethods := handlers.AllowedMethods([]string{"GET", "POST", "PUT", "HEAD", "OPTIONS"})

log.Fatal(http.ListenAndServe(":3030", handlers.CORS(allowedOrigins, allowedHeaders, allowedMethods)(router)))

Also, enabled browser security for CORS as per this article.