same problem here.
I'm running the Plugin in a WP/Woocommerce Shop.
I've installed the Plugin and entered conversion ID and label.
Problem: when a customer has placed the order (after the checkout page), the code snippet shows up correctly in the code. But on the frontpage an iframe is included containing a "302 Document has moved" text.
A screenshot can be seen here.
Or is this because of my placeholder values (ID/Label)?