postman访问服务器没响应

1.最近用postman遇到问题

Could not get any response
This seems to be like an error connecting to http://pc.oma.com:9090/oma/venue/updateVenue.
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
SSL connections are being blocked:
Fix this by importing SSL certificates in Chrome
Cookies not being sent:
Use the Postman Interceptor extension
Request timeout:
Change request timeout in Settings > General

2.我系统正常启动了，但是postman一直报上面的错，之前一直可以的。后来发现是关了windows防火墙就好了。