In the Mailjet Subscription module, not all fields are included in `config_export`, which means the configuration isn’t saved properly or accessible within the entity object.
When saving the form, there’s an issue with an undefined method `urlInfo()`.
1. Enable the Mailjet Subscription module.
2. Create a subscription.
Add the missing fields in `mailjet/modules/mailjet_subscription/src/Entity/SubscriptionForm.php`.
Use `toUri()` instead of `urlInfo()`, as `urlInfo()` has been deprecated. Update in `contrib/mailjet/modules/mailjet_subscription/src/Form/SubscriptionFormFormBase.php`.
Active
4.0
Code
Second Issue has been resolved in 4.0.2, However, the First Issue of missing fields in config_export persists.
This is a patch for version 4.0.2.