Preview mode using plugin?

[johncherba]

Hello,

I am trying to get Preview Mode to work pulling in Draft content from Kentico Kontent.

Here's what I have in the gridsome.config.js file:

plugins: [
		{
			use: '@meeg/gridsome-source-kentico-kontent',
			options: {
				deliveryClientConfig: {
					projectId: process.env.KENTICO_KONTENT_PROJECT_ID,
					previewApiKey: process.env.KENTICO_KONTENT_PREVIEW_API_KEY,
					globalQueryConfig: {
						usePreviewMode: true,
						useSecuredMode: false,
					},
					contentItemsDepth: 6,
				}
			}
		}

If I use usePreviewMode: true I get the following error:

TypeError: schemaComposer.get(...).hasInterface is not a function

If I flip it to usePreviewMode: false it runs in develop mode just fine, but does not pull in the preview api call. I was able to get preview text by using other api calls, etc. I tried this in two different projects and can not get it to work.

Does it work? If so, what am I not doing in the config to set it properly?

Thank you for your help!