Thanks for reaching out to the PayPal Community with your question. That is unfortunate you are having a difficult time using your PayPal Cash card! I don't have much information I can give you besides recommending that you contact PayPal customer service with the number on the back of the card. They can give you more information about why the card isn't working or if there are any unresolved issues with your PayPal account.
As you slide down the banister of life, may the splinters always point in the right direction. - Irish Proverb