Adobe bridge reports it does not support DNG files

Platform: Windows 10 (version 22H2), running Adobe Bridge 2024 (14.1.5.311).

I am using the same workflow I have been using for 15 years: convert files to DNG using DNG Converter (Settings - Compatibity: Camera Raw 11.2 or later; JPG Preview: Medium Size; Embed fast load data; Don’t use lossy compression; Preserve Pixel Count; Don’t embed original), and then open in Bridge for sorting, and finally exporting.

Camera Model for source images: Nikon D3 and Nikon D300, shooting in NEF/raw-format.

What I’m seeing:

• No thumbnails are visible on my DNG files. (Some random jpg images I have looked at seem to have a thumbnail.)
• Sometimes I see a “Generating thumbnail” message
• When I try to export the files to jpg, I get the error message: “unsupported format”.

Troubleshooting steps tried:

• Restarting Bridge
• Rebooting PC
• Clearing cache (Tools->Cache->Clear cache)
• Downloading the latest DNG Converter, and trying export again (still with DNG version 11.2).

This workflow worked a few days ago, so I’m at a loss what more to try. Could this be a Windows 10 issue?