This invite link isn’t working.

It may have expired, or it got cut short in the text.

Ask the parent who invited you to send you a new link, and it will work from there.

added you as a trusted babysitter.

BébéSitter texts you when they need care. Nothing to download — you reply to the text to accept.

Each babysitter enrolls through a personal link sent by the parent who invited her. This page shows that enrollment form.