Doesn't render in VSC

[deanm0000]

When I try to render a graph in VSC I see the Chart data, options, type, etc, up to Chart created in the developer console but then I get ipywidgetsKernel.js:2 Error: Failed to render widget ead80bfb5bb34800a691c9806717554f, TypeError: Cannot read properties of undefined (reading 'parent')

The full errors are:

	i	@	ipywidgetsKernel.js:2
	d	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	o	@	ipywidgetsKernel.js:2
	Promise.then (async)
	d	@	ipywidgetsKernel.js:2
	a	@	ipywidgetsKernel.js:2
	Promise.then (async)
	d	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	n	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	Promise.then (async)
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsKernel.js:2
	n	@	ipywidgetsKernel.js:2
	fe	@	ipywidgetsKernel.js:2
	(anonymous)	@	ipywidgetsRenderer.js:2
	(anonymous)	@	ipywidgetsRenderer.js:2
	(anonymous)	@	ipywidgetsRenderer.js:2
	s	@	ipywidgetsRenderer.js:2
	Promise.then (async)
	c	@	ipywidgetsRenderer.js:2
	s	@	ipywidgetsRenderer.js:2
	Promise.then (async)
	c	@	ipywidgetsRenderer.js:2
	(anonymous)	@	ipywidgetsRenderer.js:2
	t	@	ipywidgetsRenderer.js:2
	renderOutputItem	@	ipywidgetsRenderer.js:2
	renderOutputItem	@	notebookWebviewPreloads.js:3
	await in renderOutputItem (async)
	h	@	notebookWebviewPreloads.js:3
	render	@	notebookWebviewPreloads.js:3
	render	@	notebookWebviewPreloads.js:3
	renderOutputElement	@	notebookWebviewPreloads.js:3
	renderOutputCell	@	notebookWebviewPreloads.js:3
	await in renderOutputCell (async)
	(anonymous)	@	notebookWebviewPreloads.js:3
	c.set.queue	@	notebookWebviewPreloads.js:3
	enqueue	@	notebookWebviewPreloads.js:3
	(anonymous)	@	notebookWebviewPreloads.js:3
	postMessage (async)
	(anonymous)	@	index.html?id=9e26cb…tebookRenderer:1168
	HostMessaging.channel.port1.onmessage	@	index.html?id=9e26cb…otebookRenderer:308

Uncaught (in promise) SyntaxError: Unexpected end of JSON input at JSON.parse (<anonymous>) at VM171 embed-amd.js:208:86852 at VM171 embed-amd.js:208:86877

	(anonymous)	@	VM171 embed-amd.js:208
	(anonymous)	@	VM171 embed-amd.js:208
	Promise.then (async)
	h	@	VM171 embed-amd.js:208
	(anonymous)	@	embed-amd.js:210
	execCb	@	preload.js:1700
	check	@	preload.js:883
	enable	@	preload.js:1176
	init	@	preload.js:788
	(anonymous)	@	preload.js:1460
	setTimeout (async)
	req.nextTick	@	preload.js:1819
	localRequire	@	preload.js:1449
	requirejs	@	preload.js:1801
	(anonymous)	@	embed-amd.js:210
	n	@	embed-amd.js:210
	(anonymous)	@	embed-amd.js:210
	(anonymous)	@	embed-amd.js:210

If I do HTML(mychart.get_html_template()) then I get my graph so it's a reasonable work around. I don't really know much about how ipywidgets and all that stuff works in the background so not sure if there's an obvious fix here.