I installed the template LT School. However, when I try to change the logo all the menus in the layout disappear and I received the following warning in the Layout tab,

"Warning: Invalid argument supplied for foreach () in /home/institut/public_html/plugins/system/helix/layout/generated. php on line 235 ".

I am wondering if you can give some help with this issue since I cannot fix the problem.

I am using Joomla 3.3.6

Best Regards

Andreia Madeira