First, you need to register in the https://dein.ai-fitness.de/login-register area. After registering in our self-service, you will receive a confirmation email. You must complete the registration via the link in this email. The link is valid for 48 hours. If the registration is not confirmed within this time, you will need to register again. Registration is not possible without confirmation. If you have already done this and it still doesn't work, please contact us via our contact form: https://hilfe.ai-fitness.de/hc/de/requests/new?ticket_form_id=18541953027602