When I tried to upload my last save 0.18.26 and play it on 0.18.28, I received this crash notice:
Error while running event upgrade-planner-next::on_configuration_changed
Unknown style green_slot_button
stack traceback: ......... (not sure how to share my snipping tool picture of the Notice)

I tried to unselect this mod (2.1.1), but the game keeps crashing upon loading with this same message.
Any idea when you could have this fixed?

Actually, after unselecting UBaP 2.1.1, the game loaded fine. I guess when the above error bug gets fixed, I will be re-activating this mod.

Same error here, Now that this is built in I don't really need this mod any more. Loved it while it lasted.

Fixed in latest version