If you are behind a proxy, please make sure that the npm network 'proxy' config is set properly.

This error message is related to npm, which is a package manager for Node.js. If you are behind a proxy, it means that your computer is connecting to the internet through a proxy server, which can sometimes cause issues with npm.

To resolve this error, you need to configure the npm network proxy settings to match your proxy server. You can do this by running the following commands in your terminal:

npm config set proxy http://yourproxyserver:port
npm config set https-proxy http://yourproxyserver:port

Replace "yourproxyserver" with the address of your proxy server and "port" with the port number you need to use. Once you have set these configurations, try running the npm command again and see if the error message disappears.