first message: No viable BGM audio file found for Audio/BGM/beep

second message: No viable BGM audio file found for Audio/BGM/beep

third message: An error has occured!
Please report this on the Discord server, or the Steam discussions page. Link to the Disrord server can be found on the mods page.
Missing files!
Audio/BGM/beep

fourth message (then strange music began to play, the game icon and the name of the game changed "OneShot - Did i do something wrong?"):
An error has occured!
Please report this on the Discord server, or the Steam discussions page. Link to the Disrord server can be found on the mods page.
Encoding::CompatibilityError : incompatible character encodings: UTF-8 and Windows-1251
- Ruby-files/Handlers/Crash_Handler.rb:91:in `+'
- Ruby-files/Handlers/Crash_Handler.rb:91:in `send_data'
- Ruby-files/Handlers/Crash_Handler.rb:74:in `outputMissingFiles'
- Ruby-files/Scenes/Scene_Map.rb:640:in `transfer_player'
- Ruby-files/Scenes/Scene_Map.rb:183:in `block in update'
- Ruby-files/Scenes/Scene_Map.rb:156:in `loop'
- Ruby-files/Scenes/Scene_Map.rb:156:in `update'
- Ruby-files/Scenes/Scene_Map.rb:83:in `block in main'
- Ruby-files/Scenes/Scene_Map.rb:73:in `loop'
- Ruby-files/Scenes/Scene_Map.rb:73:in `main'
- Ruby-files/Initializers/Main.rb:131:in `<main>'
- 000:Main:8:in `eval'
- 000:Main:8:in `block in <main>'
- 000:Main:7:in `each'
- 000:Main:7:in `<main>'
- -e:in `eval'

fifth message: Script 'Ruby-files/Handlers/Crash_Handler.rb' line 91: Encoding::CompatibilityError occured.
incompatible character encodings: UTF-8 and Windows-1251

and the game either crashes or does not react at all. what to do? (sorry for mistakes, if any. I'm not English speaking. and thanks)