O mod Power Propagation (1.2.1) causou um erro não recuperável.
Por favor, reporte este erro ao autor do mod.

Error while running event power-propagation::on_configuration_changed
Unknown entity name: power-propagation-invisible-pole-0
stack traceback:
[C]: in function 'create_entity'
power-propagation/control.lua:70: in function 'create_power_extender'
power-propagation/control.lua:147: in function 'place_power_poles'
power-propagation/control.lua:176: in function 'refresh_all_power_poles'
power-propagation/control.lua:191: in function <power-propagation/control.lua:189>

What other mods do you have installed? Seems like some 0 sized entity exists. I'll upload a fix now but I think it's probably due to some other mod interacting with us.

1.2.2 should fix this!