Kong customer plugin not working

We had kong plugin working with:

env:

  • name: KONG_PLUGINS
    value: bundled, <plugin_name>

Likely with the latest update to repo, this has stopped working with the following error:
Error from server: error when creating “STDIN”: admission webhook “validations.kong.konghq.com” denied the request: plugin failed schema validation: schema violation (name: plugin ‘kong-plugin’ not enabled; add it to the ‘plugins’ configuration property)

What would be new way of doing this with latest update? Thanks