Update time：27-Feb-2020
Problem
If you use Tag Assistant appears Request timeout, No response from GA.
If https://www.googletagmanager.com/gtm.js?id=GTM-*** failed to load, you can see 404 or blocked:other on the network in the browser developer tools,
404
blocked:other
This will affect the collection of Google Analytics data and some data will be lost.
Ideas
For the first question, the reason is because no data is sent to Google Analytics. You can check that there is no request with collect under the network. You can see that the GTM request is 404 OR blocked:other . The reason for the second question is the same.
- 404 is a server issue.
- blocked:other It is estimated that the browser plug-in is blocked.
So there are two possible reasons. Generally speaking, Google’s servers do not say that a major error such as 404 occurs, so it is likely to be another reason.
It is very likely that you released an empty version.
Reason
GTM is in preview and has released an empty container.
Solution
Wrong solution: Some people will change https://www.googletagmanager.com/gtm.js?id=GTM-*** to https://googletagmanager.com/gtm.js?id=GTM-** *, This will indeed take effect, and can be loaded into the GTM container code normally, but if you pay attention to the report, the Active Users cannot be tracked, so this solution is not desirable.
The correct solution is to exit the preview state and publish a new non-empty version. If your GTM preview state does not respond, please see: 「Solved」-Google Tag Manager preview status is not responding
