Field from the document for the data_stream.namespace

if I specify "${kubernetes.namespace}" in the namespace field, in the integration through kibana, then I get the error
```
{"log.level":"error","@timestamp":"2022-03-15T14:43:26.432Z","log.origin":{"file.name":"fleet/fleet_gateway.go","file.line":181},"message":"failed to dispatch actions, error: could not convert the configuration from the policy: missing field accessing 'output_permissions'","ecs.version":"1.6.0"}
```
how to specify variable for namespace?

ps:
OpenShift version 4.9.10
Elasticsearch (ECK) Operator 2.1.0 provided by Elastic
elastic/kibana/fleet/agent - 8.1