If you are using the default file and seeing this result there is probably an issue with some of the items or values used in the items. Did it just start this after you updated an item or two? When did this start occurring for you? Is there any way that you can revert the changes that you have made since it was working for you? Also, do you have a link where this can be seen at all?
To debug this further we will need a link to the page and a copy of your db minus the wa_settings table. If this is information that you can't post here let me know and I will open a ticket for you on this.