Error: type 'String' is not a subtype of type 'Map<String, dynamic>' in type cast #2302

Describe the bug
Type mismatch on _$StripeErrorGenericFromJson when cancelling Stripe.instance.presentCustomerSheet():

Error: type 'String' is not a subtype of type 'Map<String, dynamic>' in type cast

To Reproduce
Steps to reproduce the behavior:

1. Open customer sheet using Stripe.instance.presentCustomerSheet().
2. Close the customer sheet.

Expected behavior
Exception should not happen

Smartphone / tablet

• Device: Simulator iPhone 17
• OS: iOS 26
• Package version: 12.1.1
• Flutter version 3.10.7