Problem with Acrobat Add-Ins in Microsoft Word 2016

I've been having problems with Acrobat Add-Ins in Microsoft Word 2016. I use Acrobat DC Pro. I have deactivated and activated it many times, but all the PDF documents that I created from Microsoft Word always contain problematic bookmarks. I also have received 'warnings' all the times, that the Add-Ins doesn't work properly. Can anyone help?

Thank you very much in advance.