Adds ground based personal construction robots.
Mods introducing new content into the game.
Related to roboports and logistic robots.
I occasionally get this error when playing 0.18.21 on a dedicated server. Restarting seems to help. Happened with Mod versions 0.5.1 and 0.5.2. Local and server versions were identical. https://ibb.co/Zhhqb6K
Duplicates https://mods.factorio.com/mod/Construction_Drones/discussion/5ea4808b76e367000e368e47
Its fixed in the next Factorio update, its a base game issue
