The transaction problem is one of the most common error that crops up and leads to Cash App not working error message. Therefore, this can be resolved using the help that you can avail of from the help center by using the FAQs to your advantage or you can also dial the help number to get the issue resolved. https://www.customerservicehelp-number.net/blog/cash-app-not-working/
If you entered the wrong card number or CVV at the time of making any transaction, then you can see that the Cash app won't let me send money. So, whenever you are going to make any transaction, then you need to ensure that you are enteirng the correct details and check it twice at least before hitting the Pay button.