If you receive a message saying “Per our terms of service, you must be 13 years of age or older to sign up for CLI Studios. This email address has been identified as belonging to someone under the age of 13, and cannot be registered for a CLI Studios membership,” this indicates that you have entered a date of birth during the registration process that has been identified as belonging to someone under the age of 13. The quickest solution to receive access as soon as possible would be to re-register using a different email address.