immugw as auditor - error - unknown method CurrentRoot

**What happened**
I don't know if this problem is a bug but, please, I need guidance to overcome the issue.

I am using immudb (v.1.3.2) and immugw (latest) as docker containers.
Immugw container is set to run as auditor (IMMUGW_AUDIT=true). Actually the environment variables are:
```
environment:
- IMMUGW_ADDRESS=0.0.0.0
- IMMUGW_PORT=3323
- IMMUGW_IMMUDB_ADDRESS=immudb
- IMMUGW_IMMUDB_PORT=3322
- IMMUGW_AUDIT=true
- IMMUGW_AUDIT_INTERVAL=1m
- IMMUGW_AUDIT_USERNAME=immudb
- IMMUGW_AUDIT_PASSWORD=immudb
```

Unfortunately, inside immugw log I have noticed an error :
```
error getting current root: rpc error: code = Unimplemented desc = unknown method CurrentRoot for service immudb.schema.ImmuService
```
I don't understand what I am doing wrong. Should I perform additional configuration ?

**What you expected to happen**
immugw to run in audit mode without errors

**How to reproduce it (as minimally and precisely as possible)**

**Environment**

**Additional info (any other context about the problem)**

Start by reviewing the Docker environment configuration and comparing immudb v1.3.2 with the latest immugw audit-mode requirements. Check the container logs around the CurrentRoot call; done means immugw runs in audit mode without the unknown-method error.

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