I can not send money or buy anything!

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Please help I get this message when i try to send money, "

We can’t send your payment right now. If you keep running into this issue, please contact PayPal.

If you continue to encounter problems, please contact customers service."

and i get this when i try to buy stuff, "

Sorry, we can’t complete your purchase at this time

Please return to the merchant and choose another way to pay."