Just looking at this also and I used Elementor Anywhere to accomplish this! So just drop the Elementor Anywhere code into the html popup.
Dear @linchengroup and @poiter,
We are preparing an update for our plugin where there shouldn’t be any problems with Elementor, as well as other page builders in WP.
You can copy the content created via page builder and use it in your popup and that should work properly for now.
Sorry for the current inconvenience!
ok, great! Thank you for your reply! It’s really great news!
Thank you very much for your replies! I’ll try to use suggested solution.
Dear @linchengroup,
Happy to help! 🙂
Let us know if you need more help!