Category ‘Not Found’

Hello,
After testing out a bunch of new plug-ins, I am getting an error message when visiting one of my category archives.
It says ‘Not Found’ and shows no content while sliding the sidebar all the way to the left.
All other categories work fine.
This category is the default category renamed Current Events, so it cannot be deleted.
The category has 6 posts in it, so it is not empty.
I have tried removing the new plug-ins but that did not do it.
Also have looked everywhere for a solution but none seem to apply to this situation.
I would link to the site, but it is local.
Thanks for the help!