Issue with HashNetNet

[PalSubham]

use ipset::{Session, types::*};
use std::net::Ipv4Addr;

fn main() -> Result<(), Error> {
    let mut session = Session::<HashNetNet>::new("test".to_string());
    session.create(|b| b.with_ipv6(false)?.build())?;

    let net1 = NetDataType::new(IpDataType::from("10.0.0.0".parse::<Ipv4Addr>()?), 24);
    let net2 = NetDataType::new(IpDataType::from("20.0.0.0".parse::<Ipv4Addr>()?), 24);


    let ret = session.add((net1, net2), &[])?;
    println!("add {}", ret);

    Ok(())
}

While running this, I get Error: Cmd("Kernel error received: ipset protocol error\n", true)