Payment Screen is not appearing on IOS side

[aliismaildev]

I am unable to integrate it on iOS side. payment screen in not appearing on iOS side with no error

[bilalep]

Explicitly convert all values of request parameter to string.
Like this final requestParam = { 'amount': amount.toString(), 'command': command.toString(), 'currency': currency.toString(), 'customer_email': customerEmail.toString(), 'language': language.toString(), 'merchant_reference': merchantReference.toString(), 'sdk_token': .sdkToken.toString(), }
For some weird reason iOS is not accepting values not enclosed in double quotes