did this just start showing up today? Ales made a change to the Project Box template, which is called by the War of 1812 template. all that it is supposed to do is stop a template in a category to cause it to add itself as a category, i.e. looping on itself.
if this is showing up in your error report, which i think gets generated on mondays, it may still be an issue with that template, just not something that was being checked before.
I cannot access the changes to the template (restricted to Leaders) but looking at several profiles that are using this one, some also pass a states, i.e. {{War of 1812, Massachusetts}}
i think that before, the template was adding the profile to the appropriate category for you, i.e. it would display an image on the profile AND add to [[Category: War of 1812, Massachusetts]]
two things.
1. the template no longer processes a passed element 1, so the error may indicate a bad parameter is being sent to the template.
2. Category names names are also being changed, in this case, [[Category: War of 1812, Massachusetts]] has been changed to [[Category: Massachusetts, War of 1812]]. the error may indicate that it is being told to add a profile to a category marked as misnamed.
since i do not see where in the template code it is trying to process parameter 1 as a category, i think option 1 is more likely. Ales is the one working on error reports, but he may be offline for a bit as he has an event this weekend.