That was know issue, can you try download those fix files from this thread https://stackideas.com/forums/can-not-save-frontpage-layout-as-menu-item , it should fix this issue.

Thank you！

Hi there,

You are most welcome. Glad to hear that your issue has been resolved now.

As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.