Scenario
When checking out Gift Certificate items, user encounter an error when submitting the order in web store: “Error processing dynamic tag for the custom item field because the system cannot find this field for gift certificate items.” This error is caused by the custom item field values is not displayed in Gift Certificate items in the web store.
Solution
Navigate to Customization > Lists, Records & Fields > Item Fields.
Click the Custom Item Field.
Applies To tab : Check the Non-inventory Item checkbox.
Click Save.