Oh man, I was banging my head off of the desk for a good long while trying to figure out why Google AdSense ads were not being displayed using Google SiteKit (Version 1.92.0) on a WordPress installation (Version 6.1.1). I scoured forums for countless hours on end blindly following rabbit trails of various troubleshooting steps, install guides on Google AdSense and Tag Manager manual installation, and reading other people’s articles that were having similar error messages, none of which were overly helpful, but was not having any luck. It’s only in retrospect, that I realized if I were paying closer attention to some really obvious details, I could have spared myself some grief and several more wasted ticks off the old life clock.
These are the two primary (redacted) error messages I was getting:
GET https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-XXXXXXXXXXXXXXXX&host=ca-host-pub-XXXXXXXXXXXXXXXX Blocked By Extension
TLDR – “Blocked By Extension” was the dead giveaway I kept overlooking.
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-XXXXXXXXXXXXXXXX&host=ca-host-pub-XXXXXXXXXXXXXXXX. (Reason: CORS request did not succeed). Status code: (null).