Descriptive Hapi/Joi validation error

I've been trying to implement Joi in our node application (joi as standalone, not with hapi) and it seems to validate the schema properly but the error is always the same

[ValidationError: value must be an object] 
name: 'ValidationError',
details:
[ { message: 'value must be an object',
   path: 'value',
   type: 'object.base',
   context: [Object] } ],
_object:.....

I never get the specifics on which key it failed on and description of why it failed.

this is a sample schema I'm using:

exports.workersSchema =
{
workers: joi.array({
    id: joi.string().alphanum(),
    wID: joi.object({
        idValue: joi.string().alphanum()
    }),
    person: {
        governmentIDs: joi.array({itemID: joi.string().alphanum()}),
        legalName: joi.object({
            givenName: joi.string(),
            middleName: joi.string(),
            preferredSalutations: joi.array(
                {
                    salutationCode: {
                        longName: joi.string()
                    }

                }
            ),
            preferredName: joi.object().keys({
                FormattedName: joi.string()
            }),
        }),
        birthDate: joi.string().alphanum()
    }
})
}

And this is the json object I'm sending :

{"workers" : [        
        {
          "id" : "",
          "wID" : {
            "idValue" : ""
          },
          "person" : {
            "governmentIDs":[{
                "itemID": "asd" 
            }],
            "legalName":{
              "givenName" : "PA",
              "middleName" : "",
              "preferredSalutations" : [{
                "salutationCode" : {
                  "longName" : ""
                    }
              }],
              "preferredName" : {
                "FormattedName" : ""
              },
              "birthDate" : ""
        }]
}

What am i doing wrong here? I even tried to follow something on the blog and while the examples were showing detailed info I never got anything besides

"value must be an object"

It validates it correctly but when it sees a misfit value it just gives that error and nothing else.

Also, if you look at the 'wID' section it has a 'idValue' object but when I get rid of the idValue and just put a alphanum right on the wID key, it also passes the validation.

Thank you so much for the help!