1) When adding Car Model, after copy paste the existing code, do NOT modify the id, otherwise the css will loss.

Click "Learn More" button popup code at line 1599 :
<div data-elementor-type="popup" data-elementor-id="487" />

Modify id=487 to other id=488
Then edit the click popup url :
href="#elementor-action:action=popup:open&settings=eyJpZCI6IjQ4NyIsInRvZ2dsZSI6ZmFsc2V9"

the value after settings = is Base64 encoded, so we need to decoded it.