Hi Davido,
this doesn’t work for several reasons.
- is your popup template even present on your test page?
- you are trying to address it via the template ID, which only has a function within the Bricks templates. The ID of your “popup” container is completely different.
- do you have any function within your scripts that opens your popup container in a lightbox?
This will never work like this 
If I were you, I would go for a popup plugin, as long as there is no native popup included in Bricks.
By the way, this also applies to the GDPR solution, which is always the better choice with an appropriate plugin (I’ve had good experiences with Real Cookie Banner or Borlabs Cookie), because these plugins not only passively show a message but actively block “critical” connections. A simple hint that cookies or certain services are used is not enough…
Best regards,
timmse