An old version of Amazon A9 bidder is running on the page.
Important: Amazon A9 works on version 0.20.5 or up
Step 1: Open your PubGuru header bidding configuration
Step 2: If you have ‘amazon’ bidder configured in the ad unit level, have them removed/deleted
Step 3: Amazon pubID should be added under Bidder Controls
Step 4: Save & publish
Step 5: Search your source code if you have deployed/hardcoded ‘amznads’ previously as a bidder. If yes, have those codes removed.
Step 6: Verify that you have the latest version of Amazon Order & Line items configured in your Ad Manager account. If in doubt, reach out to your ad representative.