fuel_category was changed to fuel_categories[] leading to this:
The mod Production Rates Calculator Extreme (0.4.1) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event sw-rates-calc-extreme::on_player_selected_area (ID 58)
LuaItemPrototype doesn't contain key fuel_category.
stack traceback:
[C]: in function 'index'
__sw-rates-lib/configurations/item-fuel.lua:66: in function 'get_production'
sw-rates-lib/scripts/configuration.lua:359: in function 'get_production'
sw-rates-lib/configurations/meta.lua:81: in function 'get_production'
sw-rates-lib/scripts/configuration.lua:359: in function 'get_production'
sw-rates-calc-extreme/scripts/sheet.lua:119: in function 'add_row'
sw-rates-calc-extreme/scripts/sheet.lua:150: in function 'build_from_entities'
sw-rates-calc-extreme/control.lua:48: in function <sw-rates-calc-extreme/control.lua:19>
