So I just clicked on an Elite NPC alert and got that message. The enemy was Okkilor, Drannik Hub (Shared to Ranks 130-600) roughly 20 minutes before this post. My rank is 170, so I don't quite get why I can't see him now. Anyone else get something like this?

Also, this same enemy shows up under "View Elite/Boss Alerts", but clicking Target gives the same error.

The most common explanation for this is that whoever shared it, did so when the timer was getting short and it has now expired. It will stay in the alert list until the person who shared it comes online again and their battle tab refreshes.

Don't worry nico I see the same okkilor and get the same message, like darth said it probably expired.

First npc Kishin alerts in months and it expires...