JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>

<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>

JavaScript

var dataArray = [
{ErrorDate: "2017-09-07", Brand: "Toyota", Count: 3},
{ErrorDate: "2017-09-02", Brand: "Ford", Count: 258},
{ErrorDate: "2017-09-03", Brand: "Ford", Count: 239},
{ErrorDate: "2017-09-04", Brand: "Ford", Count: 197},
{ErrorDate: "2017-09-05", Brand: "Ford", Count: 187},
{ErrorDate: "2017-09-06", Brand: "Ford", Count: 418},
{ErrorDate: "2017-09-07", Brand: "Ford", Count: 344},
{ErrorDate: "2017-09-03", Brand: "Mercedes", Count: 43},
{ErrorDate: "2017-09-04", Brand: "Mercedes", Count: 220},
{ErrorDate: "2017-09-03", Brand: "Chrysler", Count: 3},
{ErrorDate: "2017-09-04", Brand: "Chrysler", Count: 3},
{ErrorDate: "2017-09-06", Brand: "Chrysler", Count: 6},
{ErrorDate: "2017-09-07", Brand: "Chrysler", Count: 1}
];

Highcharts.chart('container', {
    chart: {
        type: 'spline'
    },
    title: {
        text: 'Car Metrix Test'
    },
    subtitle: {
        text: 'Irregular time data in Highcharts JS'
    },
    xAxis: {
        type: 'datetime',
        dateTimeLabelFormats: { // don't display the dummy year
            month: '%e. %b',
            year: '%b'
        },
        title: {
            text: 'Date'
        }
    },
    yAxis: {
        title: {
            text: 'Count'
        },
        min: 0
    },
    tooltip: {
        headerFormat: '<b>{series.name}</b><br>'
    },

    plotOptions: {
        spline: {
            marker: {
                enabled: true
            },
            pointInterval: 24 * 3600 * 1000
            }
    },

    series: [{
        name: 'Toyota',
        data: [3]
    }, {
        name: 'Ford',
        data: [258, 239, 197, 187, 418, 344, 256]
    }, {
        name: 'Mercedes',
        data: [3, 220]
    }, {
    		name: 'Chrysler',
        data: [3, 3, 6, 1]
    }]
});