Integration of EQ3 Max Cube (Beginner)

Hello. I am a beginner at Home assistant. I have a EQ3 Max Cube that I want to install in HASS. I have followed instructions to install the cube using YAML with file editor.

I do exactly as it says but can’t manage to install Max cube. (see pictures) If someone could help me or give me tips on what I’m doing wrong, I would be grateful. I have been working on this for two weeks with no success.

Anyone have an idea what could be the problem?