Hi there @wpmudev-support8,
Thanks for getting back to me once again!
I checked my API key and made sure to ‘Fetch the list’, chose my campaign and clicked the ‘Update Service’ button, along with saving the changes.
Everything was correct but nothing helped to rectify the issue.
I created the popup from scratch and didn’t change any form elements. This time it finally worked perfectly.
Just to clarify for reference – I hadn’t modified the form beforehand either. Only thing I had done to the form was remove the “First Name” and “Last Name” options on the form.
I thank you for your assistance.
Have a good day & thank you,
Marketing Brainiac