From this thread, kamil-sz asked:
...I'm trying to implement paypal payments but your documentation is more confusing then helping. Why do I need a return link? This makes no sense to me. What's gonna happen when I start purchase? PayPal window opens automatically? How does that work now? I also get this error all time
"Failed to initiate transaction with payment provider", I added playfab to the third party api access,my merchnatID is set up. I feel really lost in your docs.