If Cash App payment could not be sent from your account, you need to take the steps mentioned above and understand why you are having this issue.
For sending money from Cash App, you must have some balance in your account. So if there is not enough balance on Cash App, you will not be able to send it to other users and you can see payment failed on cash app.
If your Cash mobile app has not been updated, then cash app payment failure is possible. With an older version of Cash App on your mobile phone, you will face so many technical errors. So if payment could not be sent, immediately check whether you have updated Cash App or not.
If there are so many pending payments on your Cash App account, you will not be able to receive or send any money.