When the crafting is done, there is an error message.

This is the error

The mod Fish Breeding (0.0.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event FishBreeder::on_tick (ID 0)
Entity tiberium-target-dummy is not autoplacable
stack traceback:
[C]: in function 'regenerate_entity'
FishBreeder/control/breed_fish.lua:50: in function 'deploy_unit'
FishBreeder/control/breed_fish.lua:84: in function 'check_deployer'
FishBreeder/control/breed_fish.lua:105: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

That's a bug with Tiberium.