subscriptions type of payment not working?

[ahsi1999]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Entering number 123-456-789 into the cardfield.
2. Tapping the confirm button.
3. Observe a failure with exception (including the part of the stack trace, belonging to this package) …

Expected behavior
A clear and concise description of what you expected to happen.

Smartphone / tablet

• Device: [e.g. iPhone X]
• OS: [e.g. iOS 13, Android 10]
• Package version: [e.g. 1.0.0]
• Flutter version [e.g. 2.0.0.]

Additional context
Add any other context about the problem here.