What could be causing this problem?

Question

User navigation

When you click on the contacts button in the menu, what happens is shown in the screenshot. Site on WP 3.8.11 Sample HMenu built. Tell me in which direction to dig or what could be the reason for this behavior when you click on the item "contacts"

Answer 1

Judging by the screenshot, clicking on the "contacts" item is processed by the Fancybox plugin and there is no content to display in the pop-up window. the divination session on the screen is over)