Error when viewing marketing list

 Error when system administrator attempts to view marketing lists in CRM, Have reinstalled IE to IE 11 but appears to be a problem still.

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=7.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #01BC064CDetail:

<OrganizationServiceFault xmlns:i="www.w3.org/.../XMLSchema-instance" xmlns="schemas.microsoft.com/.../Contracts">

  <ErrorCode>-2147220970</ErrorCode>

  <ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic" />

  <Message>System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #01BC064C</Message>

  <Timestamp>2016-02-02T11:53:57.2482774Z</Timestamp>

  <InnerFault>

    <ErrorCode>-2147220969</ErrorCode>

    <ErrorDetails xmlns:d3p1="schemas.datacontract.org/.../System.Collections.Generic" />

    <Message>contact With Id = a485a1af-a8c3-e511-810c-3863bb349ab8 Does Not Exist</Message>

    <Timestamp>2016-02-02T11:53:57.2482774Z</Timestamp>

    <InnerFault i:nil="true" />

    <TraceText i:nil="true" />

  </InnerFault>

  <TraceText i:nil="true" />

</OrganizationServiceFault>