If you see that you accept a request but the Cash app won’t let me send money, then you need to ensure recipient details. Along with this, you have to also ensure that you have sufficient balance to make this transaction, and you are connected with a strong and stable internet connection. https://www.numbersupportcustomerservice.com/blog/cash-app-wont-let-me-send-money/

At first Cash App often checks your account for any issue that seems a bit unusual and may result in a scam. To avoid any fraud cases,Cash App does not permit the transaction. As a result, Cash App consciously fails the very payment to protect you from being charged. Though Cash App failed to send money, any amount deducted from your account will be refunded back instantly to your Cash App account or linked bank account balance. If not instantly then it may take 1-3 business days to reflect the amount in your account.

You have to avoid the risk of cancelling payments for that you should-
At first Confirm and re-check the recipient’s payment details like the phone number or Cashtag before going to start any payment.
Similarly Link only those debit or credit cards that are in your name.
Use your Cash App more often to maintain a healthy transaction history.
Next Make transactions to and from people whom you know properly.

Hope this helps.
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