You will not be able to make a payment or transfer money if your account gets frozen. Therefore you need to unfreeze cash app account to continue using your account like before. You can contact cash app technicians to know the exact reason behind this issue. Additionally, they will tell you the steps to unfreeze your account so that you will be able to make a smooth payment in the future. 

https://www.monktech.us/blog/how-do-i-unfreeze-my-app-cash/