Office Web Apps - Excel Web App causing errors - ms-office

Question

I recently managed to get Office Web apps configured with my sharepoint dev environment and am having this issue with just excel documents.
When I create or edit an excel document in the browser, I get the error:
"We're not able to contact the server. It might not be responding, or your internet connection may have been interrupted. Please try again."
Vague I know. Looking at the error from the event viewer below, does anyone have an idea as to what is causing it?
This is the error in the event viewer:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 9/29/2015 3:03:19 PM
Event time (UTC): 9/29/2015 10:03:19 PM
Event ID: 65630219f0764564b0a4e52ee555ec99
Event sequence: 6
Event occurrence: 1
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/2/ROOT/x-1-130880377864550895
Trust level: Full
Application Virtual Path: /x
Application Path: C:\Program Files\Microsoft Office Web Apps\ExcelServicesWfe\
Machine name: OWASRV01
Process information:
Process ID: 13108
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE
Exception information:
Exception type: InvalidOperationException
Exception message: Request format is unrecognized for URL unexpectedly ending in '/GetRangeContent'.
at System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath)
at System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated)
at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: http://owa.jacos.com/x/_vti_bin/DynamicGridContent.json/GetRangeContent?context={"SessionId":"32.2063a84ba0ce4808b8b7b98ee4328ce51.D86.1.V22.49w26ovr5nZhddfeEjwQWL14.5.en-US5.en-US32.39b9de68102e4682b580c274004a6a841.S1.N","TransientEditSessionToken":null,"PermissionFlags":786367,"Configurations":1585936,"CompleteResponseTimeout":0,"CollaborationParameter":{"CollaborationState":{}},"ExcelFeatures":1515932864734,"WorkbookMetadataParameter":{"WorkbookMetadataState":{"MetadataVersion":0,"ServerEventVersion":0}},"MachineCluster":null,"AjaxOptions":0}&ewaControlId="m_excelWebRenderer_ewaCtl_m_ewa"&currentObject="Sheet1"&namedObjectViewData={"Mode":1,"Settings":2}&row=28&column=30&rowCount=28&columnCount=30&blockX=1&blockY=1&revision=1&renderingOptions=0
Request path: /x/_vti_bin/DynamicGridContent.json/GetRangeContent
User host address: 10.22.250.153
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 7
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath)
at System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated)
at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Answer 1

This is an error related to the service account of the Excel Web service App not set properly. Set/Configure the service account for the office Excel web service app and recycle the app pools in your dev farm. The current settings is using "NT AUTHORITY\NETWORK SERVICE" account.