Getting error trying to make a DVD with Final Cut: Dobly Digital component missing

Using Final Cut Pro 10.4.6 on Monterey 12.7.4.

About 4 years ago, I finished making my main movie: _The Great Race_. I now need to make a DVD of it, but am unable to.

I cannot use the original NeatVideo v4 and v5 plugins on my new Mac, and my old Mac is unbootable. So I copied the finished export to the Browser window (dragged it) where it showed up as a clip. Then I put it in a project. (I cannot use the source library file (.fcpbundle) for this reason.)

So I click the project, I click Share, then DVD, and then I get this error:

DVD: The setting Dolby Digital uses software that is not installed or may no longer be supported. (Missing Compressor Plug-in)

OK, what Dolby Digital setting? Who asked for Dolby Digital?

This happens whether I put a blank DVD in the burner or not. It is a DVD-R, BTW.

Please. How can I make a DVD of this exported video? Maybe some other software?

TIA!