Need Help With Paypal

Hey guy's i'm trying to buy some zp but i keep getting this message with paypal.


Unfortunately we are not able to process your payment using your PayPal account at this moment. Please return to the merchant's website and try using a different payment method (if available).


I have $43,78 USD

And i'm trying to buy the 50k zp one.

I really don't understand cause i'm new to paypal,
If anyone could help me it would be great.