generic error

[peterejiro]

when validating a payload, it doesn't throw the exact fields missing or not allowed, instead, we get a generic error, 'invalid payload', would be nice to have the specific fields missing or not allowed

[altoblond]

When calling the decode method you get an error containing the invalid paths, but it seems to work only for second level paths not the root paths.
In an payload with
{items: {values:{hello:string}[]}}
if hello field. is wrong you get:
paths: [ [ '/values/0' ] ]
If items field is wrong you get:
paths: [ [ '' ] ]