To fix the problem, first go to “
Settings > Theme Settings > Special Features” and disable “
Fade In Page Content”.
Save changes and check your site. If it loads you can now look for the cause of the error.
Some common causes of this error and how you can fix them:
1. Theme menu locations not set.
Go to “
Appearance > Menus” and make sure you have both “
Main Menu - Left” and “
Main Menu - Right” set in the “
Theme Locations” on the top left. If you do not have a menu for both of these locations, create a new menu, save it and set it to the location. The menu can be empty without any links if you don’t want a menu in one of these locations. You can also remove either location by changing your settings under “
Appearance > Design Settings > Page Header > Menus“
2. A plugin or other custom code is causing an error.
After fixing the problem you can enable the fade in content option again if you choose to use this feature.