Please upload a log. without a log i cant help you.
Also tell me on what planet you are, what quest, what class, etc. etc.
this specific log is from:
Balmorra
Quest - Contact Made
Sith Warrior Juggernaut
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRangeException()
at Buddy.CommonBot.Profile.Quest.CompleteQuestTag.()
at Buddy.CommonBot.Profile.Quest.CompleteQuestTag.(Object )
at Buddy.BehaviorTree.Action.RunAction(Object context)
at Buddy.BehaviorTree.Action..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.Sequence..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.Decorator..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.PrioritySelector..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.Common.HookExecutor.Run(Object context)
at Buddy.BehaviorTree.Action.RunAction(Object context)
at Buddy.BehaviorTree.Action..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.PrioritySelector..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.PrioritySelector..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.Common.HookExecutor.Run(Object context)
at Buddy.BehaviorTree.Action.RunAction(Object context)
at Buddy.BehaviorTree.Action..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.Decorator..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.BehaviorTree.PrioritySelector..()
at Buddy.BehaviorTree.Composite.Tick(Object context)
at Buddy.CommonBot.BotMain.()