Left menu has been dissappeared

[ilkerburak]

i can't see our site's left menu in site previews and also site design at wizard.
i did not change anything about templates.
What can be the reason?

 

[ilkerburak]

Here:
http://forum.parallels.com/showthread.php?t=82092
is the same problem,but it is not right solution

 

[Dmitry Frantsev]

Could you provide the screen shot of the issue, so I could better understand it? Left side navigation menu is generally purposed for sub-pages or sub-menus for modules like gallery or shop.