Thank you for reaching out to us. I see you're using the under construction extension and activated the custom page for under construction which is causing the issue. I believe you have selected a normal page as a custom under construction page. Please navigate to Pro > Under Construction and disable
Use a custom Under Construction Page
Or you can create a new page with Blank - No Container | No Header, No Footer page template and then you can assign it as a custom under construction page. To learn more about under construction extension please see https://theme.co/apex/forum/t/extension-under-construction/89
Hope this helps!