Are you on Win11? It is a known issue unfortunately as explained here:
For me, opening CMD (as administrator) and then running net stop midisrv and afterwards net start midisrv (with Cubase closed) works.
Are you on Win11? It is a known issue unfortunately as explained here:
For me, opening CMD (as administrator) and then running net stop midisrv and afterwards net start midisrv (with Cubase closed) works.