Things do not appear to be working at the moment. Please try again later. How should I fix it?"

[wilasinee]

Hello
I made a paypal connection to the website but after I paid the bill

The site displays the message "Things do not appear to be working at the moment. Please try again later."

How should I fix it?

[I used to paypal account with old closed website, that are closed. I'm not sure Can I use multiple sites?]

Thank you