Paypal payment integration is not working in messenger App

[SumitRinwa]

I doing Paypal integration in Messenger bot. When I click on paypal button it get stuck on loader. I am using Palpal JavaScript SDK. When I use checkout.js it work fine but in SDK it get suck on loader after button click. 

Steps and screenshot

1) I click on Paypay buton. it open a webview in messenger app.

2) In webview i clicked on Palpay button. it open popup and screen get stuck on loader.

Thanks & Regards.

Sumit Rinwa 

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