# X_ROLE_UNKNOWN

## Means

`ROLE` names something that is not a role

## Typical cause

a typo in a compose file, a Helm value or a `docker run` — one image runs every role, so the typo would otherwise start a process that serves nothing and reports healthy

## Fix

`docker run -e ROLE=web <image>` — one of `web`, `sync`, `worker`, `scheduler`, `replicator`, `migrate`

[Config and environment](/error-codes#config-and-environment)