Error loading asset from Url..

I am struggling getting the game to work on itch.io. The problem is the loading of the resources. I am getting 403 errors like this one: 

phaser-2-ce.min.js:3 Phaser.Loader - text[backgroundTxtAsset]: error loading asset from URL ../assets/texts/imgs/background.txt (403)

I will try to resolve the problem as soon as possible. The game is still in a state where some actions work, but most of it doesn't since there are not external resources loaded.