Raspberry PI 3 KODI Files.GetDirectory error -32602

Hi,
I have a problem with OSMC raspberry Pi3 with this command:

{“jsonrpc”:”2.0″,”method”:”Files.GetDirectory”,”params”:{“directory”:”/media/routerhd/Musica/”},”id”:1}

I received this answer:
{“error”:{“code”:-32602,”message”:”Invalid params.”},”id”:1,”jsonrpc”:”2.0″}

This command work well on Osmc Raspberry Pi2.

What is the problem?

Thanks for your help

Fantasens