The bot does not work because Steam nowadays requires Steam Guard to be active for at least 15 days.
The bot never had Steam Guard since entering the code on a remote server with a console only is impossible currently.

Now I need to completely rebuild the authentication process of the bot to make it work again. Luckily xmas holidays are starting soon (which is by the way the first birthday of this bot) and I can fully focus on this.

So I am sorry, but it will take at least 15 days until I'm back...