I am trying to confirm my order and send payment to the user. but the site is not working
What user are you referring to?
It’s against Fiverr’s TOS to pay sellers outside Fiverr.
EDIT: If the user is your seller, deny the request. If the seller insists on you paying outside Fiverr, contact CS and report.
If you’re struggling to pay for an order because the Fiverr site isn’t working for you, you can contact CS: