Line symbols and label not rendering

I have a simple line graph as follows:

option = {
  xAxis: {
    type: 'category',
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      data: [820, 932, 901, 934, 1290, 1330, 1320],
      type: 'line',
      label: {
        show: true,
      },
    }
  ]
};

When running this is the echarts examples site as well as codepen.io, the data labels are rendered correctly.

However, when I run echarts in Node.JS, the data labels and sybmols (not included here) are missing.

NODE.JS code:

var fs = require("fs");
var echarts = require("echarts");
const { createCanvas } = require("canvas");
const { number } = require("echarts");

fs.readFile('options.json', 'utf8', (err, data) => {

  var options = JSON.parse(data);
  
  const canvas = createCanvas(500, 300, "svg");
  const chart = echarts.init(canvas);
  chart.setOption(options);

  var svgContent = svg.toBuffer("image/svg+xml");

  fs.writeFile('options.svg', svgContent, err => { });
});