QR Codes return message "session has timed out"

[ParishAdmin]

I have two QR codes for our PayPal account. One is from when we created the account last November. The other was created today by following the link we have on our web site. Both codes throw a screen saying the session has timed out and we need to return to PayPal. Why? What's the fix?

[Snow-Cat]

Without seeing the code, it's not possible to help - only guess ??