Hello, 

I'm new at creating games, and this is my first time using Itch and Butler.

I'm trying to push an update for my game because I'd like to release a new chapter (it's a visual novel) and I've just tried using Butler.

But when I try to load a build, nothing happens and I receive this error message: Error API 400/wharf invalid game, even though I've tried to follow the tutorials as closely as possible...

Does anyone know what causes this and how to fix it?

Thank you!!!