Hi!
When starting it gives this error:

Unknown collision mask "["out-of-map"]"
Source: transport-drone-1 (unit).

I'll give it a try.

I need your archive; these problems did not occur here.

Mod archive?

Game Save

Game Save

https://drive.google.com/file/d/1X2DISfGnNKpgRfhw5qJNFuV9kcYQpbd_/view?usp=sharing

I tried to run it on a clean game (but version 2.0.20), everything is fine, and it looks like some mod is interfering :(
I'll try to find out (probably) by the method of elimination which of the mods is preventing loading.

The prankster was found - https://mods.factorio.com/mod/space-spidertron, because of him it gives an error.
Could you look at the problem?

I have fixed the conflict issue, you can try it now.

There is no mistake, thank you!

You can send me your local files, and I can merge them into the mod.

Transport drone stack capacity: +1
Transport drone speed: +20%

I also need you to give me the native language translation of these two sentences.

https://drive.google.com/file/d/1E2qpHRc8x7uHA7OsqyNBDKlM5ihYj2IY/view?usp=sharing

Вместимость стопок для транспортных беспилотников: +1
Скорость транспортных беспилотников: +20%

Already added

Which mod is this flat UI of yours? I quite like it.

Original mod - https://mods.factorio.com/mod/FlatUI
I supplemented it with minor adjustments to the width and icons of groups, if necessary, I will send the edits.

Although here are the adjustments, uploaded in a separate file data-final-fixes.lua

local default_inventory = data.raw["utility-constants"]["default"].inventory_width
local default_recipe = data.raw["utility-constants"]["default"].select_slot_row_count
data.raw["utility-constants"]["default"].select_group_row_count = 10
data.raw["gui-style"]["default"].filter_group_tab.height = nil

------------------------------------------------------------------------------------------------------------------------

if settings.startup["inventory_width"].value == "medium" then
    data.raw["utility-constants"]["default"].inventory_width = 12
elseif settings.startup["inventory_width"].value == "big" then
    data.raw["utility-constants"]["default"].inventory_width = 14
elseif settings.startup["inventory_width"].value == "biggest" then
    data.raw["utility-constants"]["default"].inventory_width = 16
end

------------------------------------------------------------------------------------------------------------------------

if settings.startup["recipe_width"].value == "medium" then
    data.raw["utility-constants"]["default"].select_slot_row_count = 12
    data.raw["gui-style"]["default"].filter_group_tab.minimal_height = 65
    data.raw["gui-style"]["default"].filter_group_tab.minimal_width = 65
    data.raw["gui-style"]["default"].filter_group_slot_tab.size = { 65, 65 }
elseif settings.startup["recipe_width"].value == "big" then
    data.raw["utility-constants"]["default"].select_slot_row_count = 14
    data.raw["gui-style"]["default"].filter_group_tab.minimal_height = 59
    data.raw["gui-style"]["default"].filter_group_tab.minimal_width = 59
    data.raw["gui-style"]["default"].filter_group_slot_tab.size = { 59, 59 }
elseif settings.startup["recipe_width"].value == "biggest" then
    data.raw["utility-constants"]["default"].select_slot_row_count = 16
    data.raw["gui-style"]["default"].filter_group_tab.minimal_height = 53
    data.raw["gui-style"]["default"].filter_group_tab.minimal_width = 53
    data.raw["gui-style"]["default"].filter_group_slot_tab.size = { 53, 53 }
end

Thanks