Wrong contact information, outdated content, wrong dates, or anything else that may provide misinformation to users.
If you clicked a link, menu item, or button and it did not take you where you needed to go, perhaps it is a broken link.
Something about the page is interfering with its functionality. For example, a button is unclickable, text is an unreadable colour, or elements are (unreasonably) stacked on top of each other.