I have just been playing through the game and the Worker Robot Cargo size 2 Technology requires the Production Science But I have not researched the Production science tech yet. But not listed as a requirement to open the worker robot cargo size tech.
This is not anything Major and is just a wrongly listed item that needs a tech that is not available yet. Just thought it was good to mention it so you know about the error.
Bug - Very minor Research worker robots
Re: Bug - Very minor Research worker robots
We generally not list science pack dependencies, as they are super clear by it being in the card, and it would make a lot of additional mess in the graph.