With Mojave, external DVD reader does not work

[what4]

After upgrading to Mojave, I find that neither of my two external DVD player/readers will work now.

Each one spits the disk right back out.

I tried resetting PRAM. No help.

Any ideas? Experiences?

This is on a 13 inch 2015 MBP.

One of the drives is an OWC Value Line Super Slim USB 2.0.