PostgreSQL and Plesk 12

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[Closed, duplicated (sorry!)]PostgreSQL and Plesk 12

Hi there,

Following this guide i'm unable to use PostgreSQL. Powerpack is installed. When setting administrator credentials, it says:

Error: La conexión de prueba al servidor de bases de datos ha experimentado errores porque la cuenta indicada no dispone de privilegios administrativos:

FATAL: password authentication failed for user "xxxxxx"

and sometimes:

psql: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

The service is running, but the port doesn't give answer.

Thanks.