Excel failed to load the legacy Toolbox add-in

[bovender]

This issue was submitted by the add-in's exception handler.

Exception:

XLToolbox.Excel.ExcelException: Excel failed to load the legacy Toolbox add-in ---> System.Runtime.InteropServices.COMException: Exception from HRESULT: 0x800A03EC
   at Microsoft.Office.Interop.Excel.Workbooks.Open(String Filename, Object UpdateLinks, Object ReadOnly, Object Format, Object Password, Object WriteResPassword, Object IgnoreReadOnlyRecommended, Object Origin, Object Delimiter, Object Editable, Object Notify, Object Converter, Object AddToMru, Object Local, Object CorruptLoad)
   at XLToolbox.Excel.ViewModels.Instance.LoadAddinFromEmbeddedResource(String resourceName) in XLToolbox\Excel\ViewModels\Instance.cs:line 662
   --- End of inner exception stack trace ---
   at XLToolbox.Excel.ViewModels.Instance.LoadAddinFromEmbeddedResource(String resourceName) in XLToolbox\Excel\ViewModels\Instance.cs:line 668
   at XLToolbox.Legacy.LegacyToolbox..ctor() in XLToolbox\Legacy\LegacyToolbox.cs:line 65
   at XLToolbox.Legacy.LegacyToolbox.<.cctor>b__0() in XLToolbox\Legacy\LegacyToolbox.cs:line 259
   at System.Lazy`1.CreateValue()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Lazy`1.get_Value()
   at XLToolbox.Dispatcher.Execute(Command cmd) in XLToolbox\Dispatcher.cs:line 83

Message: Excel failed to load the legacy Toolbox add-in

Inner exception:

System.Runtime.InteropServices.COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC
   at Microsoft.Office.Interop.Excel.Workbooks.Open(String Filename, Object UpdateLinks, Object ReadOnly, Object Format, Object Password, Object WriteResPassword, Object IgnoreReadOnlyRecommended, Object Origin, Object Delimiter, Object Editable, Object Notify, Object Converter, Object AddToMru, Object Local, Object CorruptLoad)
   at XLToolbox.Excel.ViewModels.Instance.LoadAddinFromEmbeddedResource(String resourceName) in XLToolbox\Excel\ViewModels\Instance.cs:line 662

Inner exception message: Exception from HRESULT: 0x800A03EC

Environment

Parameter	Value
Version	7.3.2
OS	Microsoft Windows NT 6.1.7601 Service Pack 1, 64-bit
Excel	365 (16.0.4600), 64-bit
CLR	4.0.30319.42000, 64-bit
VSTO runtime	10.0.60301
ClickOnce	False
Bovender	0.17.3.0
FreeImage	3.18.0
Identifier	6a2180341bc28b5051a27e290988af5bc8790e3e69e845012a25cccefd28240a