Error 666 is caused when Smaart is unable to connect to internet when proceeding through Online Activation. Please check to make sure that your device has a stable Internet connection and that Smaart is not being blocked by a security/antivirus program or by the network's firewall, then try activation again.
If you are sure that Smaart has access to the internet, and you are also receiving a '403 Forbidden' error when trying to log into your https://my.rationalacoustics.com account, please contact our support department using the links below for further assistance.
To Contact Rational Acoustics Support:
Submit a Ticket Here or Email us at Support@RationalAcoustics.com.