A Remote Access license can only be activated on an account without any other license. As your account has already another license assigned, please use another account for the license activation.
Great to see you posting for the first time! 🚀
As the message says, a license is already activated on your account.
Please ensure to follow all the activation steps to get started: 📄 Activate your Remote Access license
Let me know if you have any questions! I'll be happy to help you further.