Hello there,
This looks like it might be down to the overlay having a different name. I’ve found a similar post for the BBB here: How do you enable the SPI pins so it might be that the dev overlays are not present.
Would it be possible to try the suggestion in that post? If that doesn’t work, please get back to us and I’ll get in contact with a device engineer to discuss what the issue might be. To help us, could you let us know what the previous version of the OS you were running on the Green was (and just to confirm, the new version)?
Best regards,
Heds