Checkout page - Internal Error. Details are available in Magento log file.

[fjahan]

hello everyone, I'm having a serious problem in the checkout page. sales are zero at this moment. here is the error:

[2018-10-04 07:49:44] main.CRITICAL: Report ID: webapi-5bb5c618e92ab; Message: Property “CheckoutFields” does not have corresponding setter in class “Magento\Quote\Api\Data\AddressExtensionInterface”. {exception] (Exception(code: 0): Report ID: webapi-5bb5c618e92ab; Message: Property \”CheckoutFields\” does not have corresponding setter in class \”Magento\\Quote\\Api\\Data\\AddressExtensionInterface\”. at /home/jiscon92/public_html/vendor/magento/framework/Webapi/ErrorProcessor.php:205, LogicException(code: 0): Property \”CheckoutFields\” does not have corresponding setter in class \”Magento\\Quote\\Api\\Data\\AddressExtensionInterface\”. at /home/jiscon92/public_html/vendor/magento/framework/Reflection/NameFinder.php:100)”} []

Kindly Help. its urgent.

[Sunil Patel]

Hello @fjahan

Seems like you are using some third party module related to customer attribute or checkout field related to that.

So you need to disable that module.

Hope it will help you