当你使用postman 访问接口时，发现返回结果是这种情况时，可要注意了！！！
Could not get any response
There was an error connecting to https://www.xxx.com
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Proxy configured incorrectly
Ensure that proxy is configured correctly in Settings > Proxy
Request timeout:
Change request timeout in Settings > General
关掉 SSl 验证
关闭这一项，这样就可以解决了，我咋就不信呢，亲测了还是不成功。
遇到问题不要慌，一步步解决，总能解决问题。
试着登录后，登录成功会有一段深颜色的文字，这段文字大致意思是你的postman工具版本太低，建议更新版本。
卸载旧版本，下载安装新版本，成功访问，SSL这一项配置也不需要修改。
最简单的方法是，卸载旧版本，安装新版本，输入url，访问没问题。