how can i resolve that error? "CS0103 The name 'GetComponet' does not exist in the current context"

void OnEnable()
{
roamPoints = GameObject.FindGameObjectsWithTag(“Roaming Point”);
navAgent = GetComponet();
state = State.Roaming;
}

you written GetComponet… instead of GetComponent();

The message is fairly obvious.
GetComponet doesn’t exist, in any Unity context.
You meant to type GetComponent. Furthermore, GetComponent() doesn’t mean anything, you need to pass a type.

navAgent = GetComponent<NavMeshAgent>();