Excel services not working - Warning 2026

Hi I'm trying to configure Excel services on a new server. I keep getting a Event ID 2026 with the following:

An internal error occurred.

   at Microsoft.Office.Excel.Server.MossHost.MossHost.Microsoft.Office.Excel.Server.Host.IEwaHost.IsSecureConnection()

   at Microsoft.Office.Excel.WebUI.EwaCUIDataSource.EnsureDocument()

   at Microsoft.Web.CommandUI.CUIDataSource.RunQuery(UIQuery query)

   at Microsoft.Office.Excel.WebUI.EwaRibbon.QueryRibbonDataSource(CultureInfo uiCulture, String clientID, Boolean denormalizeImareUri)

   at Microsoft.Office.Excel.WebUI.EwaStringsHandler.ProcessRequest(HttpContext context)

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-SharePoint Products-Excel Services Application" Guid="{278E40D0-FDAA-4EB4-AB6B-9E0AD6BDBE79}" />

    <EventID>2026</EventID>

    <Version>14</Version>

    <Level>3</Level>

    <Task>2</Task>

    <Opcode>0</Opcode>

    <Keywords>0x8000000000000000</Keywords>

    <TimeCreated SystemTime="2012-10-16T18:38:11.235108700Z" />

    <EventRecordID>33305</EventRecordID>

    <Correlation ActivityID="{CAFD6DE8-4DE9-4409-8AD1-39909C0F2B4B}" />

    <Execution ProcessID="4780" ThreadID="2808" />

    <Channel>Application</Channel>

    <Computer>MCCDC-KM.stva.mem.com</Computer>

    <Security UserID="S-1-5-21-3801421221-1730699441-3824137423-2226" />

  </System>

  <EventData>

    <Data Name="string0">   at Microsoft.Office.Excel.Server.MossHost.MossHost.Microsoft.Office.Excel.Server.Host.IEwaHost.IsSecureConnection()

   at Microsoft.Office.Excel.WebUI.EwaCUIDataSource.EnsureDocument()

   at Microsoft.Web.CommandUI.CUIDataSource.RunQuery(UIQuery query)

   at Microsoft.Office.Excel.WebUI.EwaRibbon.QueryRibbonDataSource(CultureInfo uiCulture, String clientID, Boolean denormalizeImareUri)

   at Microsoft.Office.Excel.WebUI.EwaStringsHandler.ProcessRequest(HttpContext context)</Data>

  </EventData>

</Event>

I'm also seeing an Event ID: 8306 Occurring with regularity, even though I'm not running claims.....

Anyone has any insight to this?