I could connect to my rpi4 by brute-force method because I could not connect to my wired router. It was very annoying. Password is not correct..
Anyway, I know the ip of the rpi4, and ...
I failed to fetch docker image for the witness node installation.
It seems long way to go..
It's difficult to say anything about that. You know this Instructions ?
Is the system time on your RasPi correct?
Don't be discouraged, I'm sure one of the guys from the Raspi team can help you.