When you install the MariaDB Connector/ODBC and try to connect to a server via named pipe, you will always get this error:

[ma-3.1.17]Plugin pvio_npipe could not be loaded: Das angegebene Modul wurde nicht gefunden. Library path is 'C:\Program Files\MariaDB\MariaDB ODBC Driver 64-bit\plugin\pvio_npipe.dll'

To solve this issue as an end-user, you need to install "MariaDB Connector C 64-bit" and copy the missing dll from "C:\Program Files\MariaDB\MariaDB Connector C 64-bit\lib\plugin\pvio_npipe.dll" to "C:\Program Files\MariaDB\MariaDB ODBC Driver 64-bit\plugin\pvio_npipe.dll".

However this file should be included in the ODBC package, too.
It is very nasty to explain this to the IT of my customer. It would be much easier to say "install just this package".