Preview status in GTM is not working
In GTM, you click on the preview status, and then see if the GTM can see the preview prompt:
If not. Preview status in GTM is not working.
Return to your website, if the status of the tool below appears, This is because the GTM settings page is adblocke, so you see the GTM preview prompt, you Need to turn off adblock.
This is because GTM pages are adblocked，The page function of GTM is affected, so the preview status is not displayed.
Remove plug-in adblock, and refresh：
You can see that the preview status is normal