OpsHub fails at User Mapping # getUserList - azure-devops

Question

I am trying to migrate from an on premises TFS to online using OpsHub VSO Migration Tool, but it fails when it gets to the user mapping screen with the below error. I have tried clearing the TFS cache and restarting the migration tool, but it still fails. Any help would be greatly appreciated.
10/14/2015 11:43:43,132 ERROR [http-8989-1] (com.opshub.eai.config.service.ConfigServiceImpl) - OH-TFS-Connector-0051: Operation failed getUserList. Server Error : Server was unable to process request. ---> There was an error generating the XML document. ---> TF20507: The string argument contains a character that is not valid:'u0153'. Correct the argument, and then try the operation again.
Parameter name: value
com.opshub.eai.tfs.exception.OIMTFSApiExcpetion: OH-TFS-Connector-0051: Operation failed getUserList. Server Error : Server was unable to process request. ---> There was an error generating the XML document. ---> TF20507: The string argument contains a character that is not valid:'u0153'. Correct the argument, and then try the operation again.
Parameter name: value
at com.opshub.eai.tfs.adapter.TFSClient.getUserList(TFSClient.java:502)
at com.opshub.eai.tfs.adapter.TFSAdapter.getUserList(TFSAdapter.java:550)
at com.opshub.eai.config.business.ConfigServiceBusiness.getUserList(ConfigServiceBusiness.java:975)
at com.opshub.eai.config.service.ConfigServiceImpl.getUserList(ConfigServiceImpl.java:408)
at com.opshub.eai.config.service.ConfigServiceImpl$$EnhancerByCGLIB$$a8e82089.CGLIB$getUserList$6(<generated>)
at com.opshub.eai.config.service.ConfigServiceImpl$$EnhancerByCGLIB$$a8e82089$$FastClassByCGLIB$$17643662.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at com.opshub.eai.config.service.ServiceInterception.intercept(ServiceInterception.java:48)
at com.opshub.eai.config.service.ConfigServiceImpl$$EnhancerByCGLIB$$a8e82089.getUserList(<generated>)
at com.opshub.eai.config.service.ConfigService.getUserList(ConfigService.java:99)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)