How do I fix a broken PayPal button that freezes on the loading spinner?

A PayPal button freezes when the secure checkout token handshake fails, when browser cookies block the third-party login popup, or when outdated theme scripts interrupt PayPal’s Javascript SDK on your product page.

“Most minor website breaks are caused by simple script conflicts, legacy code blocks, or broken API handshakes. We identify and clear these issues immediately as a straightforward, one-time fix.”
— Jeff Bollettino, Managing Director, Ignite Conversions