Integrating nativescript-paytm plugin in nativescript-vue application - vuejs2

Question

I'm having a nativescript-vue application where I want to integrate nativescript-paytm plugin, I created a method on click event: payNow() which contains all the necessary details of Paytm as described in Readme.md/documentation/demo app.
import {
Paytm,
Order,
TransactionCallback,
IOSCallback
} from "#nstudio/nativescript-paytm";
const paytm = new Paytm()
methods: {
payNow() {
paytm.setIOSCallbacks({
didFinishedResponse: function(response) {
console.log(response);
},
didCancelTransaction: function() {
console.log("User cancelled transaction");
},
errorMissingParameterError: function(error) {
console.log(error);
}
});
// Sample order
const order = {
// This will fail saying duplicate order id
// generate your own order to test this.
MID: "rzqfRq*******83",
ORDER_ID: "NOETIC_ORDER_0001",
CUST_ID: "CUST_6483",
INDUSTRY_TYPE_ID: "Retail",
CHANNEL_ID: "WAP",
TXN_AMOUNT: "10.00",
WEBSITE: "WEBSTAGING",
CALLBACK_URL: "https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp",
EMAIL: "rubal#example.com",
MOBILE_NO: "9876543210",
CHECKSUMHASH: "NDspZhvSHbq44K3A9Y4daf9En3l2Ndu9fmOdLG+bIwugQ6682Q3JiNprqmhiWAgGUnNcxta3LT2Vtk3EPwDww8o87A8tyn7/jAS2UAS9m+c="
};
paytm.initialize("STAGING");
paytm.createOrder(order);
paytm.startPaymentTransaction({
someUIErrorOccurred: function(inErrorMessage) {
console.log(inErrorMessage);
},
onTransactionResponse: function(inResponse) {
console.log(inResponse);
},
networkNotAvailable: function() {
console.log("Network not available");
},
clientAuthenticationFailed: function(inErrorMessage) {
console.log(inErrorMessage);
},
onErrorLoadingWebPage: function(
iniErrorCode,
inErrorMessage,
inFailingUrl
) {
console.log(iniErrorCode, inErrorMessage, inFailingUrl);
},
onBackPressedCancelTransaction: function() {
console.log("User cancelled transaction by pressing back button");
},
onTransactionCancel: function(inErrorMessage, inResponse) {
console.log(inErrorMessage, inResponse);
}
});
}
}
While executing so I only get to see screens like this:
I can see that while cancelling I get a message in my console User cancelled transaction by pressing back button that means these things are also working but I am unable to see any screen, atleast if any error message is visible I can try to debug. Help me out with this.
Here's the message which I get in my command prompt:
JS: Avoid using ListView or ScrollView with no explicit height set inside StackLayout. Doing so might results in poor user interface performance and a poor user experience.
chromium: [INFO:library_loader_hooks.cc(36)] Chromium logging enabled: level = 0, default verbosity = 0
chromium: [INFO:aw_field_trial_creator.cc(54)] First-WebView-Experiment not found
JS: 'User cancelled transaction by pressing back button'
JS: Avoid using ListView or ScrollView with no explicit height set inside StackLayout. Doing so might results in poor user interface performance and a poor user experience.
chromium: [INFO:CONSOLE(0)] "The SSL certificate used to load resources from https://pguat.paytm.com will be distrusted in the future. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information.", source: (0)
chromium: [INFO:CONSOLE(0)] "The SSL certificate used to load resources from https://pguat.paytm.com will be distrusted in the future. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information.", source: https://pguat.paytm.com/oltp-web/processTransaction?ORDER_ID=NOETIC_ORDER_0001 (0)
JS: 'User cancelled transaction by pressing back button'
JS: Avoid using ListView or ScrollView with no explicit height set inside StackLayout. Doing so might results in poor user interface performance and a poor user experience.
chromium: [INFO:CONSOLE(0)] "The SSL certificate used to load resources from https://pguat.paytm.com will be distrusted in the future. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information.", source: (0)
chromium: [INFO:CONSOLE(0)] "The SSL certificate used to load resources from https://pguat.paytm.com will be distrusted in the future. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information.", source: https://pguat.paytm.com/oltp-web/processTransaction?ORDER_ID=NOETIC_ORDER_0001 (0)
For more info I raised issue on GitHub repo: https://github.com/nstudio/nativescript-paytm/issues/5
Edit:
I tried adding it through playground, but since it uses external library integration is not possible. However I tried using in following link
https://play.nativescript.org/?template=play-vue&id=CpqoNA&v=2
Hope this gives more clear picture about it.
Edit:
My whole payment.vue file looks like following link: https://gist.github.com/nitish1986/f23644514082efe757f132e943f2df51
Thanks