i am experiencing the same issue upgrading to 0.18.20

Hello, it's not possible to use Productivity modules for Nuclear fuel?
Nuclear fuel is an intermediate product so it should be possible?

The basic logistic robot is red & green science, but to actually use it u need requester chests ... Oh u want requester chests then u need blue, purple and yellow science to! no logic in that. I was disappointed when i found out i couldn't use my little bot slaves before researching Logistic sys...