Unity, identify line of code that produces the error

Question

Guys I'm new with Unity and I'm getting this error and I can't fix it. Why is the code line not signed??

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.Graphs.Edge.WakeUp () (at <b82d8d0a349d4d70807c2fc5746a710f>:0)
UnityEditor.Graphs.Graph.DoWakeUpEdges (System.Collections.Generic.List`1[T] inEdges, System.Collections.Generic.List`1[T] ok, System.Collections.Generic.List`1[T] error, System.Boolean inEdgesUsedToBeValid) (at <b82d8d0a349d4d70807c2fc5746a710f>:0)
UnityEditor.Graphs.Graph.WakeUpEdges (System.Boolean clearSlotEdges) (at <b82d8d0a349d4d70807c2fc5746a710f>:0)
UnityEditor.Graphs.Graph.WakeUp (System.Boolean force) (at <b82d8d0a349d4d70807c2fc5746a710f>:0)
UnityEditor.Graphs.Graph.WakeUp () (at <b82d8d0a349d4d70807c2fc5746a710f>:0)
UnityEditor.Graphs.Graph.OnEnable () (at <b82d8d0a349d4d70807c2fc5746a710f>:0)

Answer 1

Try closing and reopening unity.

Found a similar forum post here which states:

This is an error in Unity's code, which is located in UnityEditor.Graphs.DLL.

it seems to occur most frequently when deleting and recreating animator controllers that don't have any transitions.

Answer 2

For example, the empty place is: you write it in the code but you don't have it in Unity, or you mount it wrong in Unity; you write some values in the code but don't assign them a value, resulting in an empty report; Button is specified in the code The function of the Button, but forgot to bind the Button in Unity; the naming in the code is not consistent with the naming in Unity; and a series of problems will lead to an empty report. After the empty report, you must carefully check whether there is any empty space in the code. value, whether there is a problem with Unity being mounted, and a series of details.