I have one issue.
MMM-covid19-sparkline app from @skelliam
Now I see in de dev-tool the next issue.

DevTools failed to parse SourceMap: http://localhost:8080/modules/MMM-COVID19-SPARKLINE/lib/highcharts.js.map
Is showing up on the DevTools. log

So ken someone tell mee what its meen and how to remove the failer.

Thanks for the help.

		{
		module: 'MMM-COVID19-SPARKLINE',
		position: "bottom_left",
		config : {
			worldStats: false,
			sparklines: true,
			sparklineWidth: 100,
			sparklineHeight: 55,
			sparklineDays: 50,
			sparklineDeltavsDaily: true, 
			sortby: "confirmed",
			columns: ["confirmed", "deaths", "recovered"],
			countries: ["Netherlands", "Germany", "Belgium"],
			updateInterval: 1000 * 60 * 60 * 8,  //8 hours
			infoRowClass: "medium",
			headerRowClass: "small",
			fadeSpeed: 1000,
			showDelta: true,
			showDeltaPlotNDays: 7,
			sparklineDeathScale: -4,
			showDelimiter: true
                }},