Sql server 2019 polybase: 100001;Failed to generate query plan.

Hi

I got the same error when creating the external data source while trying Polybase on my laptop.

The external data source is a local PostgreSQL 13 (running on WSL).

I installed the Postgresql ODBC driver and using a DSN named PostgreSQL35W_ro (tested ok, and I could connect it with for example Power BI in ODBC). I have no problem to connect using Azure Data Studio also.

I'm using the following statement (after creating a key in the database and credentials):

CREATE EXTERNAL DATA SOURCE my_postgresql_source
WITH (
LOCATION = 'odbc://localhost:5432',
CONNECTION_OPTIONS = 'DSN=PostgreSQL35W_ro',
CREDENTIAL = postgresql_creds
);

I tried also : 

CREATE EXTERNAL DATA SOURCE my_postgresql_source WITH
    (
        LOCATION = 'odbc://localhost:5432',
        CONNECTION_OPTIONS = 'Driver={PostgreSQL Unicode(x64)}; Database=mabase',
        CREDENTIAL = postgresql_creds,
        PUSHDOWN = ON
    );

It gives the same error.

My SQL Server version is Developper Edition Microsoft SQL Server 2019 (RTM-CU8) (KB4577194) - 15.0.4073.23 (X64) running  on Windows 10.

It there something wrong in my configuration ?

Thanks.