I have an error on checkout page if I am logged in. But its does not occur if I am not logged in. On the checkout page I am getting the following error:
Error occurred during "shipping_address" processing. Error occurred during "save_in_address_book" processing. Invalid type for value: "1". Expected Type: "int".
I believe this is related to data being sent from the browser to magento is invalid but I cannot find a solution. I am running Magento 2.1.0 and upgraded to 2.1.2 to test and got the same error.
Can anyone offer any assistance? TIA