I have a website www.bedr.ca  created in version 12.  When I export and import into version 13, my main menu disappears and is replaced by the type of menu icon that when clicked a menu appears on the right side of the screen.  I can not find antwhere to change it back to a standard main menu

I thought that maybe the 3D attributes of the menu were causing the issue, however after removing all 3D features , exporting and importing into v13, it still has this menu icon similar to what I have seen on my mobile view.

Any help or suggests greatly appreciated

Keith