Hello!
Just found out about this mod and I'm having fun playing it! Unfortunately, I encountered a bug in the part where you retrieve gas in a bottle that crashes the game.
The first part goes fine. I talk to the bot with the bottle active, Menderbot shows Niko the controls, bot goes into the airlock. However, inside the chamber, when Niko askes about big cluster of glitched squares, the reply dialog has the portrait replaced by black-and-pink squares, like standart "missing texture" in source engine. The gas collecting goes with no issues. Then, on return to airlock I get following messages:
"An error has occured! ... Missing files! Graphics/Faces/menderbot.png, Graphics/Faces/menderbot3.png"

"Encoding::CombatibilityError : incompatible character encodings: UTF-8 and Windows-1251
- Ruby-files/Handlers/Crash_Handler.rb: 91:in '+'; 91:in 'send_data'; 74:in 'outputMissingFile' (3 strings)
- Ruby-files/Scenes/Scene_Map.rb: 640: in 'transfer_player'; 183: in 'block in update'; 156: in 'loop'; 156: in 'update'; 83: in 'block in main'; 73: 'in 'loop'; 73: in 'main' (7 strings)
- Ruby-files/Initializers/Main.rb:131: in '<main>
- 000:Main: 8:in 'eval'; 8:in 'block in <main>'; 7: in 'each'; 7: in '<main>' (4 strings)
- -e:in 'eval' "

"Script 'Ruby-files/Handlers/Crash_Handler.rb' line 91: Encoding::CombatibilityError occured. incompatible encodings: UTF-8 and Windows-1251"

Looking at these, I guess only the first one is the bug itself, the second and third is bug reporting script error? Hope this helps anyway!
BTW, love the window title change ;)