Script loading failure from googletagmanager

I had the same issue but basically it's just because you're using a tracker blocker (like Ghostery). If you're using one, you will probably see this message in more than just your website. Try to whitelist your site and see if it works well

I had the same problem. It turned out to be the DuckDuckGo Privacy Essentials browser extension that I was using was blocking the Google tracker request. Just disabling this extension for the site resolved the problem.

I suggest checking to see if you have a similar browser extension that is blocking the request.