How to solve the dns error?

Developers
#1

Hello dear all!
Does anybody knows why I’m getting this error when I’m calling a canister? or how to resolve it?

source: hyper::Error(
    Connect,
    ConnectError(
        "dns error",
        Os {
            code: 16,
            kind: Other,
            message: "Device or resource busy",
        },
    ),
),