You attempted to reach ureddit.com, but instead you actually reached a server identifying itself as http://ureddit.com. This may be caused by a misconfiguration on the server or by something more serious. An attacker on your network could be trying to get you to visit a fake (and potentially harmful) version of ureddit.com.
You should not proceed, especially if you have never seen this warning before for this site.
It's self-signed, expired more than 1 year ago. It could be the reason for the warnings. Any plans to fix that? And there is also the other domain to consider, universityofreddit.com