Failed to load mods: Error while running setup for entity prototype "fission-reactor-equipment" (reactor): next_upgrade target (nuclear-reactor-2) must have the same bounding box.

Mods to be disabled:
• nucular-engineering (1.2.4)

This mod doesn't add a nuclear-reactor-2, so that must be something else. Try out the next update though, maybe that will help. Your post reminded me of removing the fast_replaceable_group from the fission-reactor-equipment. Maybe that was the source of the incompatibility.

Thanks

This issue happens when your mod and bob's power are combined.