Error Appearing After A Short Time Acive

I keep running across this error "[Admin Radar] Error @Animals: Object reference not set to an instance of an object --- at Oxide.Plugins.AdminRadar+Radar.GetVictim (BaseEntity entity) [0x00030] in <26fdac5ab905406993153495de5ca5b1>:0
at Oxide.Plugins.AdminRadar+Radar.ShowNPC () [0x00899] in <26fdac5ab905406993153495de5ca5b1>:0" and I do not know what it means, It appears once I activate the radar and after like five minutes

you have an animal on the server that is dead and wasn't removed from the cached list. just ignore it until i can get this update finished.