I am trying to Delete Data and Append via the PostgreSQL Bulk Loader (pgbl:) via a system dsn datasource.
It fails with

I have tried configuring the dsn with every available ssl option (disable, allow, prefer, require, verify-ca, verify-full) the first four of which all produce the same error, the same two producing a different error.
Using and ODBC connection succeeds, but is unusable because it's too slow.
Does anyone know what I need to do here?
Thanks