[Chartjs]-DiscordAPIError: Invalid Form Body embed.image.url: Scheme "[object response]" is not supported. Scheme must be one of ('http', 'https')

You must provide an image url so instead of your current fetch where you try to get the image you have to provide the quickchart link like so:

let com = `https://quickchart.io/chart?chart={
                type: 'line',
                data: {
                  labels: ['Q1', 'Q2', 'Q3', 'Q4'],
                  datasets: [{
                    label: 'Revenue',
                    data: [100, 200, 300, 400],fill:false
                  }]
                }
              }&backgroundColor=transparent&width=500&height=300&devicePixelRatio=1.0&format=png&version=2.9.3`

if (message) {
  // rest of code
}