I see you’re using a Off-canvas menu but there’s no menu assigned to it.
To assign a menu on the “blue/purple” block, you can set a menu to the off-canvas menu location on Appearance > Menus.
Select the menu you want to assign and check “Off-canvas” on the location so the selected menu also appears inside the blue/purple block. https://share.getcloudapp.com/kpuDgW8X