Disconnect after a second connect

[a8thunder]

private let ca = OpenVPN.CryptoContainer(pem: """
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
""")

extension ViewController {
private static let appGroup = "group.tmt.DemoApp"

private static let tunnelIdentifier = "com.tmt.AppVPN.com-tmt-AppVPN-Extension"

private func makeProtocol() -> NETunnelProviderProtocol {
    let server = textServer.text!
    let domain = textDomain.text!
    
    let hostname = ((domain == "") ? server : [server, domain].joined(separator: "."))
    let port = UInt16(textPort.text!)!
    let credentials = OpenVPN.Credentials(textUsername.text!, textPassword.text!)
    
    var sessionBuilder = OpenVPN.ConfigurationBuilder()
    sessionBuilder.ca = ca
    sessionBuilder.cipher = .aes128cbc
    sessionBuilder.digest = .sha1
    sessionBuilder.compressionFraming = .compLZO
    sessionBuilder.renegotiatesAfter = nil
    sessionBuilder.hostname = "51.254.35.77"
    let socketType: SocketType = switchTCP.isOn ? .tcp : .udp
    sessionBuilder.endpointProtocols = [EndpointProtocol(socketType, port)]
    sessionBuilder.usesPIAPatches = false
    var builder = OpenVPNTunnelProvider.ConfigurationBuilder(sessionConfiguration: sessionBuilder.build())
    builder.mtu = 1350
    builder.shouldDebug = false
    builder.masksPrivateData = false
    
    let configuration = builder.build()
    return try! configuration.generatedTunnelProtocol(
        withBundleIdentifier: ViewController.tunnelIdentifier,
        appGroup: ViewController.appGroup,
        credentials: credentials
    )
}

}

class ViewController: UIViewController, URLSessionDataDelegate {

var currentManager: NETunnelProviderManager?

var status = NEVPNStatus.invalid

override func viewDidLoad() {
    super.viewDidLoad()
    
    textServer.text = "France"
    textDomain.text = "51.254.35.77"
    textPort.text = "443"
    switchTCP.isOn = false
    textUsername.text = "triminh0209-vpnjantit.com"
    textPassword.text = "minhtri0209"
    
    NotificationCenter.default.addObserver(self,
                                           selector: #selector(VPNStatusDidChange(notification:)),
                                           name: .NEVPNStatusDidChange,
                                           object: nil)
    
    reloadCurrentManager(nil)

    //
    
    testFetchRef()
}

Help me!!!!!!!!!!!!!1
thank you.