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Tag Assistant could not connect to a tag 0 Recommended Answers 73 Replies 178 Upvotes
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Hi! 
I setup Tag Manager on my site some days ago and it was working as a charm. I setup a tag for Google Analytics and everything was fine.
Now, today I added a Tag with Facebook Ads and tried to check it out in the preview mode and it just wont work, i keep getting this message:

But the thing is that the Tag Assistant extensions says it's correctly installed, so it shouldnt be a problem about the Tag Manager Setup:



(I use ghostery but it is disabled for all this work)


On the other hand, and this is quite a weird thing now, event the old Google Analytics tag stopped working, it is not firing for some reason...
Any clues?
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No, same here. Everything worked fine before the new debugging mode. Now I can't do anything because the Tag Assistant can not connect....
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Its seem weired sometime it connect and workfine but most of the time it say "Tag Assistant could not connect to a tag on"   connection time ou
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Just tried removing tag assistant plugin from browser, its now working for me 

The page will open in new window but you can see the timeout issue will be no more
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Hi,

Thanks for the report. This issue is caused by Chrome putting background tabs to sleep. We have a fix that will roll out soon. In the meantime, a workaround is to open the two tabs in two different browser windows, e.g. put them side by side. Apologies for the inconvenience.
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How soon is "soon"?
Days? 
Weeks?
Months?

What is your best guess-timate?
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@Andrew Lanzone, your workaround does not work.
Since anytime i click on "reconnect", the GTM Debug Window automatically opens a new Tab with the website in the background.
(Background tab being silenced > Error Message)

Alright.
So I open the website in a new Window and click on the "show debugger" Button.
What happens? A new TAB opens.
(Background tab being silenced > Error Message)

So I click on "try again" in debug window (>new tab opens)
(Background tab being silenced > Error Message)

So there is NO WAY to work with two separate windows as far as I can see
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Hi,

Try disabling the tag assistant extension or AdBlock. It worked for me.
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It does not work for me either. Disabled Tag assist and AdBlock and it will just open a new window and time out after a while.
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Que se puede hacer en este caso, ya que intenté hacer lo que mencionan, todavía me aparece error
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Try publishing the container. I hope this article will help: [Solved] Google Tag Manager Preview Mode Not Working? 18 ways to fix it (analyticsmania.com)
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