Chart not displaying any data

Summary

Chart not displaying any data (based on REST endpoint)

Content

Hi,

I have a REST endpoint providing this format of data

[
    {
        "BalId": "1000003",
        "BalName": "Included Health Checks",
        "CredLimit": "-",
        "CredThres": "-",
        "BalVal": "-5.0"
    },
    {
        "BalId": "1000003",
        "BalName": "Included Health Checks",
        "CredLimit": "-",
        "CredThres": "-",
        "BalVal": "-5.0"
    }
]

I would like to display the balance name on X axis and balance value on Y on a bar Chart

I manage to configure my chart pointing to the endpoint and selecting the fields, but the graph is empty. 

Any idea or example I could follow. It works if I have a business object with some records, but not with that endpoint.