Browser console error (Grafana Image Rendering) on K8s

Grafana Configuration
1

hello,

so i got Grafana 6.4.3 and Grafana Rendering Image Latest on kubernetes.
it’s look something like this in K8s manifest:

    spec:
      containers:
      - image: grafana/grafana-image-renderer:latest
        name: grafana-rendering
      - image: grafana/grafana:6.4.3
        name: grafana-core
        resources:
          limits:
            cpu: 100m
            memory: 100Mi
          requests:
            cpu: 100m
            memory: 100Mi
        env:
          - name: GF_RENDERING_SERVER_URL
            value: http://localhost:8081/render
          - name: GF_RENDERING_CALLBACK_URL
            value: https://<GRAFANA_DOMAIN>/
          - name: GF_LOG_FILTERS
            value: rendering:debug
          - name: GF_SERVER_DOMAIN
            value: "https://<GRAFANA_DOMAIN>"
          - name: GF_DATABASE_TYPE
            value: mysql
          - name: GF_DATABASE_HOST
            value: <MYSQL_DATABASE>
          - name: GF_DATABASE_NAME
            value: grafana
          - name: GF_DATABASE_USER
            value: grafana01
          - name: GF_DATABASE_PASSWORD
            valueFrom:
              secretKeyRef:
                name: mysql-grafana
                key: USER_PASSWORD
          - name: GF_AUTH_BASIC_ENABLED
            value: "true"
          - name: GF_AUTH_ANONYMOUS_ENABLED
            value: "false"
          - name: GF_SERVER_ROOT_URL
            value: "<GRAFANA_DOMAIN>"

and when i see the logs of grafana-rendering container i see some errors like this:

"message":"Request failed"
"message":"Browser console error"

is it because of version conflict between grafana and grafana-rendering ?
is it because of i’m doing something wrong in the environments ?

thanks.