Sections not available in Appearance

Hi there.

I am building a new website for a client, but cannot find the Sections option to tick and activate in Appearance > GeneratePress. I have checked my settings and also for any plugin conflicts, but nothing there that could be causing this. It is also not appearing as a tick option in screen settings when I edit a page.

This has never happened before. I am really baffled!

Please advise of how I can make sections work again.

Thank you so much.

Elzanne :-)