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I already have cards linked to my acct and every time I try to send money it asks me to link a new card. When I do link the card, it acts as if I never did and greys out the send payment now button. There is more than enough money in my bank accts. I linked more cards to it to see if it was my fault and none of them worked.
A long shot but do you see a "change" link during checkout to select a card instead of adding a card?
Try sending money via PayPal app, or, the website if you were having problems sending in the app. Or use a different browser.