Broken WordPress all links broken

I’m sure this is probably something very simple, but I can’t think of how to phrase it to search for answers on google or even here.

Here’s the problem all links on wordpress refer one level above what they should i.e. wordpress is located at … .com/board/ so login should be .com/board/wp-login.php . That is what should happen, instead all the links look like this .com/wp-login.php and when I view individual posts I it tells me there are errors in lines 5 and 9 in single.php both of which deal with templatepath.

Unfortunately, I wasn’t there when the mistake was made so I don’t know what the person was working on when it happened I just got called in later. Any help would be greatly appreciated.