I tried to use the GTM guide to track Universal Analytics on our forum. We have previously used the standard GA function. This has worked previously (though it only appears to work for users who are logged in).
I am an experienced GTM user (though admittedly far from an expert) and I followed the guide for setting up with Google Tag Manager [Setup Google Tag Manager for Analytics]. See below:
Initially, I was able to track traffic from GTM, but within a few minutes the tracking stopped. I gave a day to wait and see if any other traffic was recorded, but there was not.
To test whether this was a fault with GA or GTM, I created a new GA property with no filters but still no traffic appeared. Additionally, despite updating the security settings, I could not get Tag Manager’s debugging tool to work. The window would launch, but no matter how long I left it to load it would remain a blank window at the bottom of my screen.
Since I returned tracking to the GA setup, traffic has resumed, but still there is no traffic from users who are not logged in.
Please could you explain what the issue appears to be and how to fix it.