Relay http3endpoint gives error : unable to create DATAGRAM flow since the peer did not provide max_datagram_frame_size in transport parameters

I am using Relay to connect to nginx server which supports http3 connections for which I get

quic_stream_send_create [C1.1.1.1:5] [24e7c30b6b4eb7ba-0000000000001002e2c0e6cb5099cd86ef1f0f7c] unable to create DATAGRAM flow since the peer did not provide max_datagram_frame_size in transport parameters

[C1.1.1.1:3] Unable to send 1200 early bytes quic_stream_send_create [C1.1.1.1:5] [24e7c30b6b4eb7ba-0000000000001002e2c0e6cb5099cd86ef1f0f7c] unable to create DATAGRAM flow since the peer did not provide max_datagram_frame_size in transport parameters

This is something very simple I have written :

` let relayURL = URL(string: "https://192.168.64.2:8443")!
        let relayEndpoint = NWEndpoint.url(relayURL)
        if #available(iOS 17.0, *) {
            var tlsOptions = NWProtocolTLS.Options()
            let relayServer = ProxyConfiguration.RelayHop(http3RelayEndpoint: relayEndpoint, tlsOptions: NWProtocolTLS.Options = .init())
            let relayConfig = ProxyConfiguration(relayHops: [relayServer])
            let config = URLSessionConfiguration.default`

        config.connectionProxyDictionary = [kCFNetworkProxiesHTTPEnable as AnyHashable: true,
                                                     kCFNetworkProxiesHTTPProxy as AnyHashable: "192.168.64.2",
                                                     kCFNetworkProxiesHTTPPort as AnyHashable: 8443,
                                            kCFStreamPropertySSLSettings as AnyHashable:  sslSettings]

        config.proxyConfigurations = [relayConfig]
        // Call addCert to add the certificate to the trust store
        //addCert(cert: "cert")

        // Example usage of the custom session
        let session = makeInsecureURLSession(config: config)
        let url = URL(string: "https://google.com")! // Example URL
        let task = session.dataTask(with: url) { data, response, error in
            // Handle response
            print("response is \(response)")

            if let httpResponse = response as? HTTPURLResponse {
                let protocolUsed = httpResponse.url?.scheme ?? "Unknown"
                print("Protocol used: \(protocolUsed)")
            } else {
                print("Response is not an HTTPURLResponse")
            }
        }
        task.resume()