Why "Unhandled promise rejection TypeError: null is not a function" while using AdyenCheckout in my angular app?

Question

In my angular app, I'm using AdyenCheckout for payment, But once I open my screen where I'm using AdyenCheckout (Payment screen), I'm getting a console error repeatedly when I move my cursor

"Unhandled promise rejection TypeError: null is not a function"

Following is my package.json

"@adyen/adyen-web": "^4.5.0",
"@agm/core": "1.0.0-beta.3",
"@angular/animations": "8.2.13",
"@angular/cdk": "^8.1.1",
"@angular/cli": "8.3.17",
"@angular/common": "8.2.13",
"@angular/compiler": "8.2.13",
"@angular/core": "8.2.13",
"@angular/forms": "8.2.13",
"@angular/material": "8.1.1",
"@angular/material-moment-adapter": "8.1.1",
"@angular/platform-browser": "8.2.13",
"@angular/platform-browser-dynamic": "8.2.13",
"@angular/router": "8.2.13",

Checkout code

const checkout = new AdyenCheckout(configuration);

Answer 1

upgrade version to "@adyen/adyen-web": "5.5.0",

 const checkout = await AdyenCheckout(configuration);