An invalid security token was provided (Bad TokenType "") : we are using Axis2 1.7.0 with Rampart 1.7.0

[java] 2016-06-13 11:14:30,953 DEBUG [main] processor.SignatureProcessor:115 - Found signature element
[java] 2016-06-13 11:14:30,968 ERROR [main] engine.AxisEngine:207 - An invalid security token was provided (Bad TokenType "")
[java] org.apache.axis2.AxisFault: An invalid security token was provided (Bad TokenType "")
[java] at org.apache.rampart.handler.RampartReceiver.setFaultCodeAndThrowAxisFault(RampartReceiver.java:180)
[java] at org.apache.rampart.handler.RampartReceiver.invoke(RampartReceiver.java:95)
[java] at org.apache.axis2.engine.Phase.invokeHandler(Phase.java:335)
[java] at org.apache.axis2.engine.Phase.invoke(Phase.java:308)
[java] at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:250)
[java] at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:156)
[java] at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:357)
[java] at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:414)
[java] at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:225)
[java] at org.apache.axis2.client.OperationClient.execute(OperationClient.java:150)