Hi, hoping someone can help - i receive the following when trying to install the Excel Add-in in StudioX community 2021.4.0. I have Office 2013 with all updates
Error
Setup Extensions X
Unable to cast COM object of type ‘Microsoft.Officeinterop.Excel.ApplicationClass’ to interface type ‘Microsoft.Officeinterop.Excel._Application’. This operation failed because the Querylnterface call on the COM component for the interface with 11D1000208D5-0000-0000- C000-000000000046}’ failed due to the following error: Library not registered. (Exception from HRESULT: Ox8002801D (TYPE_E_LIBNOTREGISTERED)).
It might be a bit complicated for us to debug this based on the screen shot alone Most helpful would be if you could provide us with the logs (%localappdata%/UiPath/Logs) and also please do consider that most of us are proficient in English
RemoteException wrapping UiPath.Excel.ExcelException: Error opening workbook. If Excel is installed, run the ‘Repair Tool for Microsoft Office Interop’ from the Tools tab on the Home screen. —> RemoteException wrapping System.InvalidCastException: Unable to cast COM object of type ‘Microsoft.Office.Interop.Excel.ApplicationClass’ to interface type ‘Microsoft.Office.Interop.Excel._Application’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{000208D5-0000-0000-C000-000000000046}’ failed due to the following error: Error loading type library/DLL. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)).
at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease)
at Microsoft.Office.Interop.Excel.ApplicationClass.set_SheetsInNewWorkbook(Int32 RHS)
at UiPath.Excel.Helpers.ExcelInteropHelpers.GetNewComApplication()
— End of inner exception stack trace —
at UiPath.Excel.Helpers.ExcelInteropHelpers.GetNewComApplication()
at UiPath.Excel.Helpers.ExcelInteropHelpers.StartNewApplication(ExcelStartOptions options)
at UiPath.Excel.Helpers.ComApp.ExcelComAppReferenceCountManager.InternalComAppReferenceCountManager.StartNewApplication(ExcelStartOptions startOptions)
at UiPath.Shared.ComAppReferenceCountManager`3.StartOrAttach(TComAppStartOptions startOptions, Boolean killOnJobClose, Boolean& wasAlreadyRunning)
at UiPath.Excel.Helpers.ComApp.ExcelComAppReferenceCountManager.StartOrAttach(ComAppOptions comAppOptions, ExcelStartOptions excelStartOptions, Boolean& wasAlreadyRunning)
at UiPath.Excel.WorkbookApplication.AttachOrCreateNew(WorkbookArguments workbookArguments)
at UiPath.Excel.Activities.ExcelApplicationScope.<>c.<.ctor>b__53_0(WorkbookArguments args)
at UiPath.Excel.Activities.ExcelApplicationScope.Execute(NativeActivityContext context)
at System.Activities.NativeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
at System.Activities.ActivityInstance.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)
at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
Ways To Fix Error Loading Excel Solver Add-In
Download Excel File Repair Tool rated Excellent by Softpedia, Softonic & CNET.
Select the corrupt Excel file (XLS, XLSX) & click Repair to initiate the repair process.
Preview the repaired files and click Save File to save the files at desired location.
Most helpful would be if you could provide us with the logs (%localappdata%/UiPath/Logs) and also please do consider that most of us are proficient in English 
ashokkarale