Error opening workbook. Make sure excel is installed. S-3

When you will try to open Excel with the “Excel application scope,” you would receive the following error:  “System.Exception: Error openning workbook. Make sure Excel is installed —> 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 …

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