Error in saving as Adobe PDF | macOS Mojave 10.14

In macOS Mojave (v10.14), when you try to print a document to PDF, using the System Print Dialog > Save As Adobe PDF, the following error message is displayed: "This workflow contains the action Save As Adobe PDF, which is provided by a third party. Third party actions must be explicitly enabled."

An example scenario

In your Mac, launch any application. For example, if you are using Microsoft Word, open the document you want to save as a PDF.

Select File > Print, or press Cmd + P.

In the PDF drop-down list, select Save As Adobe PDF.

You get an error: "This workflow contains the action Save As Adobe PDF, which is provided by a third party. Third party actions must be explicitly enabled."