Question:
Why the popup is not showing with CSS class.
Answers:
Please make sure the structure is correct. It should be like this: sg-popup-id-7298 (7298 is given as an example).
You retrieve it from here:

Please be sure that you've set Everywhere from the Events section.
You can check it here:

Why the popup is not showing with CSS class.
Answers:
Please make sure the structure is correct. It should be like this: sg-popup-id-7298 (7298 is given as an example).
You retrieve it from here:

Please be sure that you've set Everywhere from the Events section.
You can check it here:

Updated on: 24 / 02 / 2020