I Can't connect the Tag Manager

After I Implement The GTM Code in my website and Google tag manager Preview mode it showing google tag not found. can anyone help me please.

Hi Rasel, you need to publish your site.

Also I usually paste the code in the site settings custom code head area, there is also a way to add GTM just with the code on one of the other settings tabs… the SEO tab maybe?

Try both approaches.