I cannot make calls with the voice notification module

hello everyone
I have a problem with the voice module I have already configured everything and I am using the Netelip SIP service I have entered all the data correctly but in the registration part I get the following:

java.net.SocketException: Socket is closed

at java.base/java.net.DatagramSocket.send(Unknown Source)
at net.sourceforge.peers.sip.transport.UdpMessageSender.sendBytes(UdpMessageSnder.java:63)
at net.sourceforge.peers.sip.transport.UdpMessageSender.sendMessage(UdpMessageSender.java:52)
at net.sourceforge.peers.sip.transaction.NonInviteClientTransaction.sendRetrans(NonInviteClientTransaction.java:138)
at net.sourceforge.peers.sip.transaction.NonInviteClientTransactionStateTrying.timerEFires(NonInviteClientTransactionStateTrying.java:41)
at net.sourceforge.peers.sip.transaction.NonInviteClientTransaction$TimerE.run(NonInviteClientTransaction.java:178)
at java.base/java.util.TimerThread.mainLoop(Unknown Source)
at java.base/java.util.TimerThread.run(Unknown Source)

Someone has had the same problem or could advise me that I am doing wrong or if someone has used a service other than netelip that works well