You may need contact customer service in order to see why you get the message.
It sounds like it could be security system blocking you.
Have you verified a card on PayPal?
What is the amount you try to withdraw and how did you receive the money?
Are you logging in from a device or location you do not tend to log in from?
You could try change password and security questions, and using a computer with a secure network. You may need to wait full 24 hours before attempt if it still fails after this.
Otherwise contact customer service and they may be able to help.
