i noticed that the proto uranium processing has no output items.
from my basic understanding of the lua, it seems to be because resource.mineable.results is empty while resource.mineable.result (without the s at the end) is filled.
i got it working by creating a results array myself in the case of result (no s) is truthy and use it when defining the recipe: results = {{type="item", name=resource.minable.result, amount=1}} (in case mineable.results is not empty, then use that instead)
no clue if that works for modded resources

thanks for the mod

Thanks for sharing your fix, just ran into that issue as well