main menu can not display saying
Notice: Trying to get property of non-object in C:wampwwwmjtemplatesjf_well-benesserescriptsphpmainmenu.php on line 28
help

You should turn off notice in php.ini, menu will work. Please search google to find how to turn off notice for php.

I had the same, ...
why no solution, just "google for solution"

to solve this you can turn of the error reporting.

If you want to turn off notice error just put the below code in index.php file at site root directory as well as in the index.php file at the template that you are using.

The code is
error_reporting(0);

solution by varmen26

but it should be fixed also in the template