Thank you for posting this troubleshooting guide!
I'm from another team who's having problems uploading their project.
I updated the first release 1.0 with only text_credits.lua changed to test the credits and it worked correctly.
From version 1.1 I tried to upload the ip with edited text_translated.lua but got a black screen: https://saratodaro.itch.io/locjam-6-submission
I wasn't able to find any code issue in MemoQ nor in the Sellaroli translation tool.
Then, I tried to download version 1.2, but I apparently I can't extract it. I get an unknown type error for several elements, included game.js.
Any idea where my problem could lie?