drop down menu and arrows not appearing

Hi. I recently changed the layout of the theme and the drop down menu effects and arrows do not appear. What is the setting I need to change to make the work?

www.3rdpta.org

the menu is set for fade&slide from left
show arrows on

Everything is set to on on the Layout page.

Please assist.

Thank you!

Lily

Hi!
Probably, this is caused by the work of your third-party plugins. Please, try to disable your plugins one by one to detect the problem.