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Link to CodeSandbox.

I was about to start working on this app again. It worked perfectly about a month ago, however now I get the error: Cannot read property 'toString" of undefined

It doesn't pinpoint where the error is either.

Drew Reese
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JD Fill
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  • In the sandbox there is a "problems" tab, click on the problem and it opens your breakpoints.scss file and highlights the first line, the comment. I tried removing them but the error keeps moving down and starts highlighting the CSS. I'm not familiar with scss. – Drew Reese Apr 18 '20 at 17:04

1 Answers1

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It looks like you are using the create-react-app environment.

Build your project off of the parcel environment, installing the needed react dependencies, and it will work.

They talk about this issue here

Al Duncanson
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