Hi, thanks for using our checkout field editor plugin.
To resolve this issue please do the following steps.
First check your permalink structure used. Change it to “post name” and check again.
If the issue is not solved, then add the following code to your theme/child-theme functions.php file and check.
add_filter( 'woocommerce_is_rest_api_request', function(){} );
If the issue persists, then this may be a compatibility issue with some of the plugins used. To confirm this, deactivate the active plugin one by one and check. If you found any such plugin, then please share its details with us. We will check and let you know.
