paypal sanbox we are sorry Things does not apear wotking at the moment nodejs, express [closed]

https://www.sandbox.paypal.com/webapps/hermes/error?cmd=_express-checkout&token=EC-1C2040236Y893900K&rc=1

Paypal sandbox was working for three month it has stopped now for couple days. approvel_url: https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-1C2040236Y893900K%27, and then I get redirected to https://www.sandbox.paypal.com/webapps/hermes/error?cmd=_express-checkout&token=EC-1C2040236Y893900K&rc=1

I have a bus/account connected to my store. I have tested to clear cache and test on private webbrowser and still not working