https://mods.factorio.com/mod/FishBreeder

per mod author they believe this is a TibDawn mod issue.

https://mods.factorio.com/mod/FishBreeder/discussion/6254bfccdee3aa61204a9d6f

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>

They are asserting that every modded fish entity must be autoplace-able. I disagree, since modded fish entities can be managed by mod scripts instead of autoplace. I think this is one them for making bad assumptions, like when some mods assume that every simple-entity must be a rock.