I just instaled module Magento 2 Checkout Custom Field on Magento 2.2.9
After placing an order I get an error and this what ist in the error log:
main.CRITICAL: Report ID: webapi-5efdcf5c15503; Message: Property "BssCustomfield" does not have accessor method "getBssCustomfield" in class "Magento\Quote\Api\Data\PaymentExtensionInterface".
To fix that issue, before deploying the files, please clean up these folders:
If you need any further support, please feel free to contact us.
We are always willing to support you.