Can't click on save changes

Hello,

When I use layout builder it will not let me save the changes. The save changes box is not clickable and I have this message -

This layout builder tool allows you to configure the layout of the main content area.

To manage other areas of the page, use the block administration page.

Forms and links inside the content of the layout builder tool have been disabled.

If anyone could support as this would be a great help to build a page

Many thanks,

Rosie