CountryStateEntity: Attempted to call an undefined method named "swaggerFormats"

[no0dles]

Hi

There is an issue on the current version of the shopware 6 plugin.
Transactions can be created, because the TransactionService uses a method getCountryState on the customer address.

It expects a string value, but shopware returns an object.
https://github.com/shopware/shopware/blob/6e64e0f299b00b904f1d2dfecba0e0cfdff7869f/src/Core/Checkout/Customer/Aggregate/CustomerAddress/CustomerAddressEntity.php#L15

This bug prevents the checkout page to load.

I'm not sure what value of the object was used before, this issue is quite critical.