"An error occurred while sending invite request

net.java.sip.communicator.service.protocol.OperationFailedException: An error occurred while sending invite request
       at net.java.sip.communicator.impl.protocol.sip.ProtocolProviderServiceSipImpl.throwOperationFailedException(ProtocolProviderServiceSipImpl.java:3168)
       at net.java.sip.communicator.impl.protocol.sip.CallPeerSipImpl.invite(CallPeerSipImpl.java:1430)
       at net.java.sip.communicator.impl.protocol.sip.CallSipImpl.invite(CallSipImpl.java:195)
       at net.java.sip.communicator.impl.protocol.sip.OperationSetBasicTelephonySipImpl.createOutgoingCall(OperationSetBasicTelephonySipImpl.java:192)
       at net.java.sip.communicator.impl.protocol.sip.OperationSetBasicTelephonySipImpl.createCall(OperationSetBasicTelephonySipImpl.java:116)
       at net.java.sip.communicator.impl.gui.main.call.CallManager$CreateCallThread.run(CallManager.java:1064)
Caused by: net.java.sip.communicator.service.protocol.OperationFailedException: An error occurred while creating session description
       at net.java.sip.communicator.impl.protocol.sip.ProtocolProviderServiceSipImpl.throwOperationFailedException(ProtocolProviderServiceSipImpl.java:3168)
       at net.java.sip.communicator.impl.protocol.sip.sdp.SdpUtils.createSessionDescription(SdpUtils.java:187)
       at net.java.sip.communicator.impl.protocol.sip.CallPeerMediaHandlerSipImpl.createFirstOffer(CallPeerMediaHandlerSipImpl.java:133)
       at net.java.sip.communicator.impl.protocol.sip.CallPeerMediaHandlerSipImpl.createOffer(CallPeerMediaHandlerSipImpl.java:108)
       at net.java.sip.communicator.impl.protocol.sip.CallPeerSipImpl.invite(CallPeerSipImpl.java:1413)
       ... 4 more
Caused by: javax.sdp.SdpException: The parameter is null
       at gov.nist.javax.sdp.SessionDescriptionImpl.setOrigin(SessionDescriptionImpl.java:480)
       at javax.sdp.SdpFactory.createSessionDescription(SdpFactory.java:79)
       at net.java.sip.communicator.impl.protocol.sip.sdp.SdpUtils.createSessionDescription(SdpUtils.java:136)
       ... 7 more"