Invalid type string received

[Firesphere]

I think issue #6 is back again in version 0.2.4
I have two installations of Kodi CLI, 0.2.2 which works, and 0.2.4 which doesn't.
Error:

{
  "error": {
    "code": -32602, 
    "data": {
      "method": "VideoLibrary.Scan", 
      "stack": {
        "message": "Invalid type string received", 
        "name": "showdialogs", 
        "type": "boolean"
      }
  },
 "message": "Invalid params."
},
 "id": 1,
 "jsonrpc": "2.0"
}