What are restrictions for Free plan?
Free plan has a limit of 2 bots and a limited trading volume ($3K/month). You won't be able to create new ones if you have already more than 2 bots and won't be able to turn on more than 2 bots simultaneously.
If you already have 2 bots and want to create another one, you would first need to delete at least one bot, to create and launch a new one.
You are also won't be able to trade if your trading volume exceeded $3000 in the past month. This limit resets every month.