I am running SharePoint 2013 Enterprise and reside in the UK where we use it for our intranet.
I have created an Excel Services service application and then a web application and a site collection beneath it with a BI site.
When I load up the Excel Services Sample Workbook and click on the slicers everything works fine. However, when I change the Regional Settings of the BI site from English(United States) to English(United Kingdom) and repeat the process I get the error: "We don't know what happened, but something went wrong"
This error also occurs when I load Excel spread sheets containing PowerPivot slicers.
Checking the ULS log there are a number of messages for the correlation ID, the most significant is this one:
ExcelService.PostProcessRequest: The server encountered a very serious error and will continue to function. Please log this as a bug. Exception was: System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception.
at Microsoft.Office.Excel.Server.CalculationServer.ExcelServiceBase.PostProcessRequest(EcsCommandResult result, Exception ex) System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception.
at Microsoft.Office.Excel.Server.CalculationServer.ExcelServiceBase.PostProcessRequest(EcsCommandResult result, Exception ex) StackTrace:
at Microsoft.Office.Server.Native.dll: (sig=1f86b0bf-2440-4b16-9099-860a571153c2|2|microsoft.office.server.native.pdb, offset=131CE)
at Microsoft.Office.Server.Native.dll: (offset=21C85)
If I then change the Regional Settings of the BI site back to English(United States) the problem goes away, although obviously currency and dates in the reports are US and not UK.
I have found a couple of articles that refer to missing file directories for the 2057 locale id but they haven't been any help (they refer to a different problem but I thought it might be the same principle) - 2057 is, I believe, the locale id for United Kingdom.
Does anyone have a clue how to address this issue?