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Hi - what is a "courier worker"? I am getting this error now ...

```time=2023-04-13T04:47:25Z level=fatal msg=Failed to run courier worker. audience=application error=map[message:ERROR: relation "courier_messages" does not exist (SQLSTATE 42P01)] service_name=kratos service_version=```

Courier is in charge of emails etc. Check your Kratos database for the courier_messages table. If it doesn’t exist, you might need to run migrations again

<https://www.ory.sh/docs/kratos/cli/kratos-migrate-sql>

fwiw: I was using a very old version of kratos, so that was causing the original issue

learning k8s rn and I mistakenly put v0.11.1 as the version value so it was pulling a very old helm chart