Mail merge 0x80004002

I keep gettig this error whith Mail Merge add on
when I want to send an excel list. The lists opens correctly but the merge fails. I have no idea how to fix this


NS_NOINTERFACE: Component returned failure code: 0x80004002 (NS_NOINTERFACE) [nsISupports.QueryInterface]

This forum is for discussions about developing add-ons, not for
end-user add-on questions. In the future you should go to for end-user support for add-ons.

  Regarding your problem with Mail Merge in particular, your best

bet is to contact the maintainer of the add-on. There’s a support
email address on its home page (