Mattermost v7.9.1 team-edition helm deployment issues

I found a workaround. Add this to you helm values:

extraInitContainers:
  - command:
      - sh
      - '-c'
      - chown -R 2000:2000 /client/plugins
    image: busybox
    name: changeowner
    volumeMounts:
      - mountPath: /client/plugins
        name: mattermost-plugins

This runs a init container which changes the owner of the plugins folder.