Web Apps Server ASP .NET error code 3005 event ID 1309 same key already added

[AWS]

I've had Office Web App Server 2013 running for about a week now, and today all of a sudden, users aren't able to user office web apps through SharePoint, Lync, or Exchange. on the Web App server i'm receiving the following error:


Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 2/11/2013 3:16:34 PM
Event time (UTC): 2/11/2013 11:16:34 PM
Event ID: 749adeaec3404f709e73cc62ca464d12
Event sequence: 114
Event occurrence: 45
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/2/ROOT/x-1-130050953692875562

Trust level: Full
Application Virtual Path: /x
Application Path: Crogram FilesMicrosoft Office Web AppsExcelServicesWfe

Machine name: OWA

Process information:
Process ID: 2844
Process name: w3wp.exe
Account name: NT AUTHORITYNETWORK SERVICE

Exception information:
Exception type: ArgumentException
Exception message: An item with the same key has already been added.
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Microsoft.Office.Web.Apps.Environment.WacServer.WSConfigAdapter.TryGetValue[T](String settingName, T& value)
at Microsoft.Office.Web.Apps.Common.WopiDocument.ValidateHostAndSetFileSource()
at Microsoft.Office.Web.Apps.Common.WopiDocument..ctor(String fileRep, String accessToken, Int64 accessTokenTtl, String version, String sessionContext, WopiType wopiType)
at Microsoft.Office.Web.Apps.Common.WopiDocument.IsValidWopiQueryString(String querySignature, BaseDocumentType docType, Boolean createDoc, BaseDocument& doc)
at Microsoft.Office.Web.Apps.Common.WopiDocument.CreateFromQuerySignature(String querySignature)
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost.Microsoft.Office.Excel.Server.Host.IEwaHost.GetFileRepresentation(HttpContext context, Boolean newWorkbook)
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost.Microsoft.Office.Excel.Server.Host.IEwaHost.PreProcessRequest(HttpContext context)
at Microsoft.Office.Excel.WebUI.XlViewerInternal.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


Request information:
Request URL:
https://office.domain.com:443/x/_layouts/xlviewerinternal.aspx?ui=en-US&rs=en-US&WOPISrc=http://tis-sp.teehub1.com/division/options/_vti_bin/wopi.ashx/files/24e7f514ec264dcabdead01d4f602f7e&sc=http://kifo-sp.domain.com/division/options/SitePages/Home.aspx?RootFolder=An
unhandled exception has occurred.FdivisionAn unhandled exception has occurred.FoptionsAn unhandled exception has occurred.FOptionsAn unhandled exception has occurred.FFund%201%2FPost%2Dtrade%2FCollateral%20and%20margin&FolderCTID=0x012000783B1A92E1B44A4EA90ED899C583F732&View=%7B720E5A2B%2D4E4B%2D4038%2DB48E%2D61FC345B480D%7D

Request path: /x/_layouts/xlviewerinternal.aspx
User host address: 216.14.34.228
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITYNETWORK SERVICE

Thread information:
Thread ID: 36
Thread account name: NT AUTHORITYNETWORK SERVICE
Is impersonating: False
Stack trace: at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Microsoft.Office.Web.Apps.Environment.WacServer.WSConfigAdapter.TryGetValue[T](String settingName, T& value)
at Microsoft.Office.Web.Apps.Common.WopiDocument.ValidateHostAndSetFileSource()
at Microsoft.Office.Web.Apps.Common.WopiDocument..ctor(String fileRep, String accessToken, Int64 accessTokenTtl, String version, String sessionContext, WopiType wopiType)
at Microsoft.Office.Web.Apps.Common.WopiDocument.IsValidWopiQueryString(String querySignature, BaseDocumentType docType, Boolean createDoc, BaseDocument& doc)
at Microsoft.Office.Web.Apps.Common.WopiDocument.CreateFromQuerySignature(String querySignature)
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost.Microsoft.Office.Excel.Server.Host.IEwaHost.GetFileRepresentation(HttpContext context, Boolean newWorkbook)
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost.Microsoft.Office.Excel.Server.Host.IEwaHost.PreProcessRequest(HttpContext context)
at Microsoft.Office.Excel.WebUI.XlViewerInternal.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


Custom event details:

Any ideas on how to solve this?

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