Failed to load mods: Error while loading entity prototype "cerys-fulgoran-cryogenic-plant-upcrafting-1" (assembling-machine): Key "item" not found in property tree at ROOT.assembling-machine.cerys-fulgoran-cryogenic-plant-upcrafting-1.placeable_by
Modifications: No More Gambling
Mods to be disabled:
no-more-gambling (1.1.0)

Ugh... this was just a typo. Fix'd.

Well thanks for getting on this so quickly. I still seem to be having the same problem. do I need to do the reset checkbox or something? Pretty sure its the same error, but I will copy and paste it here just to be certain.

Failed to load mods: Error while loading entity prototype "cerys-fulgoran-cryogenic-plant-upcrafting-1" (assembling-machine): Key "item" not found in property tree at ROOT.assembling-machine.cerys-fulgoran-cryogenic-plant-upcrafting-1.placeable_by
Modifications: No More Gambling Mods to be disabled : no-more-gambling (1.1.1)

Sorry, it ended up being something different. Basically these entities aren't placeable by anything, so the placeable_by array was empty, which is what the error message was actually complaining about.

Fixed. For real this time.