Megamenu wont show the menu items

We just installed the OSP Real Homes template with all the plugins but when click the megamenu button in the template it goes :

"This will direct you to the Megamenu Configuration page. However, you have chosen using the Joomla Module over Megamenu, hence the Megamenu Configuration is not necessary in this case. Please click again to continue!"

And when I continue it doesn't show any item when I select either main or user menu.

Hi,
I am not sure with your idea, can you please explain it more details?
Thanks
Dam

Once again, we were able to fix it by reinstall the component. This is fixed now.