you must provide a valid key about stripe

[ihadeed]

You need to pass the key in an object:

StripePlugin.setPublishableKey({ key: 'your key here' })

[josebyte]

Thanks! I take it from the usage example:

INITIALIZING THE PLUGIN
import { Plugins } from '@capacitor/core';
const { Stripe } = Plugins;
...
await Stripe.setPublishableKey('pk_test_....');

If you want maybe I can help you with the documentation.