Outlook 2016 / Acrobat PDFMaker Office COM Addin Issue

On Windows 10...

In Outlook 2016 > File > Options > Addins >

The "Acrobat PDFMaker Office COM Addin" is under "Inactive Application Add-ins".

At the bottom > COM Addins > Go

This Addin is unchecked.

If I try to select it, I get the message, "Not loaded. A runtime error occurred during the loading of the COM Add-in.

I tried some of these solutions with no success.

PDFMaker unavailable | Office 2007, 2010, 2013 | Acrobat 9, Acrobat X, Acrobat XI, Acrobat DC

The add-in is in the correct location:

C:\Program Files (x86)\Adobe\Acrobat 11.0\PDFMaker\Mail\Outlook

In MS Word, there is a different addin loaded and I can save as a PDF.

C:\Program Files (x86)\Adobe\Acrobat 11.0\PDFMaker\Office\PDFMOfficeAddin.dll

Any help is appreciated.