I get this error when trying to fill a Tanker ship (with crude oil) from the Cargoships mods

The mod Fluid Override (0.1.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event fluid_override::on_nth_tick(10)
fluid_override/control.lua:53: attempt to index a nil value
stack traceback:
fluid_override/control.lua:53: in function 'is_almost_empty'
fluid_override/control.lua:29: in function 'check_fluidbox'
fluid_override/control.lua:19: in function <fluid_override/control.lua:15>