Env工具更新软件包失败

pkgs --update
error message:'NoneType' object is not iterable
Failed to connect to the mirror server, package will be downloaded from non-mirror server.
Start to download package : network_samples-v0.3.0.zip
https://github.com/RT-Thread-packages/network-sample/archive/v0.3.0.zip
error message:HTTPSConnectionPool(host='github.com', port=443): Max retries exceeded with url: /RT-Thread-packages/network-sample/archive/v0.3.0.zip (Caused by ProxyError('Cannot connect to proxy.', error('Tunnel connection failed: 407 authenticationrequired',)))