We currently have a pop-up offer on a client site, installed directly into their website. We’d like to transition to a new master pop-up script and place that on the Google Tag Manager that we’ve sent them. When we try to test the new script on the GTM, nothing shows up on the page. We see a confirmation from GTM that the container fired, with no visible results otherwise.

I’m happy to give any clarification on the issue. Need some good advice!

Thanks.