Shopify requires some fields to be boolean values, e.g. True or False.  If you do not provide a true or false value for these fields you will get an error message letting you know that the value you provided is not valid.

To solve this problem, simply change the field value in your uploaded file to either True or False.  In order to make this easier, we will also display the field and the value causing the problem.

This happens mostly with the taxes_included field on the Order Details tab as well as the gift_card and taxable field on the Line Items tab.  There are a few other fields to look out for but these are the most common.