Modify 1316 Word layout fails

Hi

I'm trying to modify the report 1316 word layout in NAV 2017.
And get's this error :

A call to
Microsoft.Dynamics.Nav.Integration.Office.Word.WordHelper.CallO
pen failed with this message: Unable to cast COM object of type
’Microsoft.Office.Interop.Word.ApplicationClass' to interface type
’Microsoft.Office.lnterop.Word._Application'. This operation failed
because the Querylnterface call on the COM component for the
interface with IID '{00020970-0000-0000-C000-000000000046}' failed
due to the following error: Fejl under indleesning af type-DLL.
(Exception from HRESULT: 0x80029C4A
(TYPE_E_CANTLOADLIBRARY)).

Office 2016


Can someone help me out here THANKS

Regards Kenneth