"Famlily Challenges
Family challenges are multiplayer tasks, may I advise you to plan them before starting them.
Having a discord, a forum, or any tool to gather and prepare the challenge is strongly advised if you don't want to fail them.
Launching such events without correct preparation will make you fail, and will result in spoiling your resources."
Enough text to add it as an awerness to the task.
The dev will say : It is obvious.
But you may mail them...