camera shake not working

Assets/Scripts/Camera/CameraShake.cs

@@ -0,0 +1,40 @@
+using Cinemachine;
+using UnityEngine;
+
+public class CameraShake : MonoBehaviour
+{
+    [SerializeField]private CinemachineFreeLook v_Camera;
+    private float shakeTimer;
+
+    public static CameraShake Instance;
+
+    private void Start()
+    {
+        if (Instance != this)
+            Destroy(Instance);
+        Instance = this;
+    }
+
+    public void ShakeCamera(float intensity, float time)
+    {
+        CinemachineBasicMultiChannelPerlin multiChannelPerlin = v_Camera.GetComponent<CinemachineBasicMultiChannelPerlin>();
+
+        multiChannelPerlin.m_AmplitudeGain = intensity;
+        shakeTimer = time;
+    }
+
+    private void Update()
+    {
+        if (shakeTimer > 0)
+        {
+            shakeTimer -= Time.deltaTime;
+            if (shakeTimer <= 0f)
+            {
+                CinemachineBasicMultiChannelPerlin multiChannelPerlin = v_Camera.GetComponent<CinemachineBasicMultiChannelPerlin>();
+
+                multiChannelPerlin.m_AmplitudeGain = 0f;
+
+            }
+        }
+    }
+}

Assets/Scripts/Camera/CameraShake.cs.meta

@@ -0,0 +1,11 @@
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+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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