How to fix build failures with `create-react-app` in production

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Seems like you are perhaps running into this situation?

[Support Guide] Why do I see “Uncaught SyntaxError: Unexpected token <” errors? How can I use chunking or versioning for my assets at Netlify?

Last reviewed by Netlify Support on December 2022 The error Uncaught SyntaxError: Unexpected token < is most commonly caused by your site’s code referring to an asset that is no longer available. Most commonly, this is due to a filename change in assets generated during your build. The same situation happens if you use versioned or chunked javascript where the filename changes with every deploy. Let’s look at an example: A file that was named /assets/main-123abc.js would change to /assets…

Many of those URL’s have asset fingerprints or hashes in them, and older content already loaded can refer back to files that do not exist in your current deploy.