methnen on "[Plugin: M Chart] Undefined index and undefined variable"

I tried both Firefox and Chrome. Let me copy & paste that syntax error:

<div id="m-chart-container-281" class="m-chart-container"> <div id="m-chart-281" class="m-chart"></div>
</div>
<script type="text/javascript"> var m_chart_highcharts_281 = { chart_args: <br />
<b>Notice</b>: Undefined offset: 0 in <b>C:xampphtdocssandbox001wp-contentpluginsm-chartcomponentsclass-m-chart-parse.php</b> on line <b>91</b><br />
<br />
<b>Notice</b>: Undefined offset: 0 in <b>C:xampphtdocssandbox001wp-contentpluginsm-chartcomponentsclass-m-chart-parse.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>: Undefined index: first_row in <b>C:xampphtdocssandbox001wp-contentpluginsm-chartcomponentsclass-m-chart-parse.php</b> on line <b>287</b><br />
{"chart":{"type":"line","show_labels":true,"renderTo":"m-chart-281","height":400},"title":{"text":"dsfsdfsfsdfs"},"subtitle":{"text":""},"legend":{"enabled":true},"credits":{"href":"","text":""},"exporting":{"enabled":false},"plotOptions":{"series":{"dataLabels":{"enabled":true,"format":"{y:,f}"},"connectNulls":true},"line":{"dataLabels":{"enabled":true}}},"xAxis":{"categories":[],"title":{"text":""}},"yAxis":{"title":{"text":""}},"series":[],"colors":["#4572A7","#AA4643","#89A54E","#80699B","#3D96AE","#DB843D","#92A8CD","#A47D7C","#B5CA92"]}, post_id: 281 };

The highlighted line is that of chart_args: <br />