Hey, just wanted to let you know that the mod will cause an error with 2.1.20 because fuel_category is now fuel_categories...

Error while running event FilterHelper::on_gui_opened (ID 104)
LuaItemPrototype doesn't contain key fuel_category.
stack traceback:
[C]: in function 'index'
__FilterHelper/control.lua:52: in function 'get_items_by_fuel_category'
FilterHelper/control.lua:358: in function 'add_items_fuel_entity_input'
FilterHelper/control.lua:398: in function 'add_items_drop_target_entity'
FilterHelper/control.lua:415: in function 'add_items_inserter'
FilterHelper/control.lua:505: in function 'add_items_chest'
FilterHelper/control.lua:577: in function 'add_items'
FilterHelper/control.lua:608: in function 'update_ui'
FilterHelper/control.lua:647: in function <FilterHelper/control.lua:642>
939.552 Error ServerMultiplayerManager.cpp:85: MultiplayerManager failed: "The mod Filter Helper (0.2.27) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event FilterHelper::on_gui_opened (ID 104)
LuaItemPrototype doesn't contain key fuel_category.
stack traceback:
[C]: in function 'index'
__FilterHelper/control.lua:52: in function 'get_items_by_fuel_category'
FilterHelper/control.lua:358: in function 'add_items_fuel_entity_input'
FilterHelper/control.lua:398: in function 'add_items_drop_target_entity'
FilterHelper/control.lua:415: in function 'add_items_inserter'
FilterHelper/control.lua:505: in function 'add_items_chest'
FilterHelper/control.lua:577: in function 'add_items'
FilterHelper/control.lua:608: in function 'update_ui'
FilterHelper/control.lua:647: in function <FilterHelper/control.lua:642>"
939.552 Info ServerMultiplayerManager.cpp:809: updateTick(55422227) changing state from(InGame) to(Failed)

same problem here

same
https://ibb.co/1JZyyHNr

unzip the mod, make this edit:

diff --git a/control.lua b/control.lua
index 14a094a..ec56693 100644
--- a/control.lua
+++ b/control.lua
@@ -49,8 +49,7 @@ local function get_items_by_fuel_category(fuel_category)
     if not fuel_category_to_items_cache then
         fuel_category_to_items_cache = {}
         for _, item_prototype in pairs(prototypes.item) do
-            local item_fuel_category = item_prototype.fuel_category
-            if item_fuel_category then
+            for _, item_fuel_category in pairs(item_prototype.fuel_categories or {}) do
                 if not fuel_category_to_items_cache[item_fuel_category] then
                     fuel_category_to_items_cache[item_fuel_category] = {}

Confirmed pacak's patch is correct for 2.1.20. After unzipping, rezip with the FilterHelper_0.2.27/ folder at the top level and move the original zip out of the mods folder, or Factorio will keep loading it.

You don't have to rezip, factorio will prefer unzipped copy of the same version.

Fixed