Open dashboard got 500 ERROR

[crazychengmm]

open viz dashboard got 500 ERROR

response:
{"error":"HTTP error, status Code [403] (unexpected API response)"}

check the log at web

the log at Pod metrics-api linkerd-proxy

linkerd2:
Client version: stable-2.11.5
Server version: stable-2.11.5

k8s:
Client Version: v1.19.16
Server Version: v1.19.16

new in linkerd, please help me, guys
ORZ