Joomla does not display the lists menu, what's the problem?

Good day. Recently started to experiment with joomla, at first everything was fine and smooth, until I put the virtuemart module, which I did not like and I deleted it. After installed joomshopping and began to torment him. Maybe it has nothing to do with the modules of the stores, but now when I try to create a menu item, when choosing the type of the item POPs up an empty window.
Got into Google, found the manual how to cure, but to my case it didn't fit. They recommend to do so:
1. In the file /modules/mod_mainmenu/helper.php on line 31 before the parameter $params remove the &symbol
2. The same in file /libraries/joomla/html/html/menu.php 124 on the line before $children
3. The same thing /libraries/joomla/html/html/grid.php - 93,115,157 front row $row
But the problem is that I don't have a folder /html/ in Jumla.
Where to dig?
Version Joomla: Joomla! 3.5.1 Stable [ Unicorn ]
Php version: 5.3.29
MySQLi Version: 5.5.43-37.2
Here is screen with error: c40f76bc724545d1a6b91a793e751cb2.jpg
July 9th 19 at 10:23
1 answer
July 9th 19 at 10:25
move gumlu - will be easier.

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