System.ServiceModel.FaultException: Server was unable to process request. ---> Invalid token

Server stack trace: 
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at NCWeb.legaonline.APISoap.GetEvent(String authToken, String sort, String filter)
   at NCWeb.legaonline.APISoapClient.GetEvent(String authToken, String sort, String filter) in C:\Dev\NCWeb\NCWeb\Connected Services\legaonline\Reference.cs:line 15374
   at NCWeb.CustomModules.NCC_Events.GetContent() in C:\Dev\NCWeb\NCWeb\CustomModules\NCC_Events.cs:line 95
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)