Handle join-request error error=rx_info_set is empty

Hi,
I'm trying to configure Lorawan roaming beetween Chirpstack and Actility.
I set the configuration according the documentation found online but when a device try to execute a Join Request, Chirsptack wrote this error message:

2025-11-21T09:08:40.491679Z ERROR up{deduplication_id=b3011a99-4046-40f1-81bd-2782314ca8f9}: chirpstack::uplink::join: Handle join-request error error=rx_info_set is empty

I checked the rust source code and I found the errore message on file "mod.rs":

fn filter_rx_info_by_public_only(uplink: &mut UplinkFrameSet) -> Result<()> {
    let mut rx_info_set: Vec<gw::UplinkRxInfo> = Vec::new();

    for rx_info in &uplink.rx_info_set {
        let gateway_id = EUI64::from_str(&rx_info.gateway_id).context("Gateway ID")?;
        if !(*uplink
            .gateway_private_up_map
            .get(&gateway_id)
            .ok_or_else(|| anyhow!("gateway_id missing in gateway_private_up_map"))?)
        {
            rx_info_set.push(rx_info.clone());
        }
    }

    uplink.rx_info_set = rx_info_set;
    if uplink.rx_info_set.is_empty() {
        return Err(anyhow!("rx_info_set is empty"));
    }

    Ok(())
}

I checked the json message sent via MQTT and it seems to have all the information.

{
    "phy_payload": {
        "mhdr": {
            "f_type": "JoinRequest",
            "major": "LoRaWANR1"
        },
        "mic": [
            67,
            238,
            68,
            5
        ],
        "payload": {
            "dev_eui": "1234567890abcdef",
            "dev_nonce": 62507,
            "join_eui": "0000000000000000"
        }
    },
    "rx_info": [
        {
            "channel": 1,
            "context": "dkoEPw==",
            "crcStatus": "CRC_OK",
            "gatewayId": "1234567890abcdef",
            "location": {},
            "nsTime": "2025-11-21T09:12:15.853369653+00:00",
            "rfChain": 1,
            "rssi": -48,
            "snr": 9.800000190734863,
            "uplinkId": 45591
        }
    ],
    "tx_info": {
        "frequency": 868300000,
        "modulation": {
            "lora": {
                "bandwidth": 125000,
                "codeRate": "CR_4_5",
                "spreadingFactor": 11
            }
        }
    }
}

Any idea ?