TypeError: The 'compilation' argument must be an instance of Compilation about addon-designs HOT 7 CLOSED

Had the same issue and the problem were mulitple Webpack Versions (4.x and 5x). You should check that via yarn why webpack and should just use one version (probably 4.44.2) or so

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If you face this error, please make sure you don't include multiple webpack versions in your project.

FYI, I published [email protected] that drops the PDF preview feature.

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It's hard to diagnose errors related to the worker script (react-pdf/dist/pdf.worker.entry.js)...

An error with the same message has reported on html-webpack-plugin and that might help you. If your lockfile has multiple webpack versions, it might be the root cause.

I'll release [email protected], which drops react-pdf from our dependencies, until the end of this year (Sorry, I'm a bit busy now...)

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Hi, I just tried installing the addon and following the setup for the new storybook (6+) syntax. Everything seems to build fine but I do not see a design tab in my stories. Tried added params globally and to specific stories and did the same with the decorator.

I have no log either of any sort of error which is not helpful. @pocka how could I setup the repo and try to debug on my side?

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@kiily
This issue is for a webpack config bug (probably) caused by the combination of multiple webpack installations and worker-loader. (I edited the title)

I believe this could help: #43

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Strange, for me what fixed it was reverting to the old syntax in main.js. Passing the following string 'storybook-addon-designs/register' immediately resulted in a working story

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I also have this problem,but it is happen when I use VueLoaderPlugin,but it is necessary for me to use VueLoaderPlugin in my project;
plugins: [
new VueLoaderPlugin(),
]
Does anyone have this problem？I would appreciate your help

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