Getting the message: "Sorry, something went wrong. Please try again" in sandbox testing.

[nirn]

Hello,

When testing the Paypal buttons in sandbox mode, I am getting the pop-up error message: "Sorry, something went wrong. Please try again" (see screen capture below). From the user perspective, the transaction failed, but I do see a successful transaction in my PayPal account.

Any ideas how to solve this?

Thank you,

Nir

Additional technical info:

Browser type: chrome.
Pop up error window address bar: https://www.sandbox.paypal.com/checkoutweb/genericError?sessionID=uid_<some id>&buttonSessionID=uid_<some id>&stickinessID=uid_<some id>&smokeHash=&fundingSource=paypal&buyerCountry=US&locale.x=en_&commit=true&clientID=<my client id>&env=sandbox&sdkMeta=<some very long code>&xcomponent=1&version=5.0.401&token=<some token>&ssrt=<some number>&rcache=1&useraction=CONTINUE&cookieBannerVariant=hidden&country.x=&fromSignupLite=true&code=<some code>