Update:
- Found 2.729 for pi here. http://updates.volumio.org/pi/volumio/2.729/volumio-2.729-2020-03-18-pi.img.zip
- Flashed.
- It worked.
- Clicked “Check Updates” in Volumio, updated to 2.834.
- It worked.
So, for those looking for the 2.834 version but it doesn’t work from the website download, consider going with 2.729 and updating from there.