Submissions are broken

Problem/Motivation

It is impossible to submit the webforms anymore.
The code is now using an undefined variable in StripeWebformHandler line 220

      $stripe_customer_create = [
        'name' => $payment_method->billing_details->name,
        'email' => $payment_method->billing_details->email,
        'address' => $payment_method->billing_details->address->toArray(),
        'metadata' => $metadata,
      ];

In my IDE it is underlined in red because the variable $payment_method is never defined before which is crashing the webform.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes