The error you are experiencing is part of our security feature. We at Nexon America continuously strive to upgrade our security in order to better serve and protect our players.
If you are seeing this error then you are most likely experiencing the effects of the feature and you may not be able to create new accounts, use PayPal, the credit card features and/or use the Free NX offers. We hope you understand that these features are for the security of the individual and community as a whole.
Thank you for your understanding.