Display this error message if validation fails

If validation fails, the custom error message is displayed as defined in the "Display this error message if validation fails" field.

 This message is optional but recommended.

Its goal is to inform your users that validation failed and what will happen (should they contact you or retry?).

If validation fails, the end user is also given the opportunity to enter another activation key.

If the activation cannot be validated Always skip validation if no Internet connection is available