Hi Sekander,
Thank you for the quick reply!
I am not confident to share the website URL here in the public forum but I would love to do it in a private conversation.
The website indeed has an SSL Certificate configured. I will play a bit with the settings and update if that solves the issue.
I did click on the “Check API Connection” button and the modal said the connection is OK.
Still wondering what might be causing this strange behavior.