For GameServer Startup, Errors or Warnings can all be treated as Warnings...
If your GameServer fail to Start (not Listening to Incoming Connection), then it means some of the Errors were REAL issues
But these Errors/Warnings could break some in game feature, like HunabKu says, Mob not having the correct Class (so most scripted behavior disabeld), NPC not patrolling due to a missing Patrol Path, Region Objects could be Partly Loaded from an exception breaking the Region loading procedure. (Here your Shar Labyrinth Region could be missing some NPC)
For error : Item Creation Template Not Found
You can search the StackTrace for any Errors related to the GameServer Code and find that stack trace lead to GameAuruliteMerchant
This probably mean you're missing Aurulite Currency (and you need to check the code of GameAuriliteMerchant to find the Id_Nb of the expected item)