Module parse failed: Unexpected token (257:106) You may need an appropriate loader to handle this file type

I made a workaround. I compared my old and new package-lock.json of my projects and I saw some @babel lib version changed to v7.20.2 (on Nov 4th, 2022). I overwrote the new package-lock.json with old one and my react app built and ran successfully again.

I then changed (downgrade) some of @babel package in my package.json and it is solved the problem:

Put this lines into your package.json file:

"@babel/core": "7.19.6",
"@babel/generator": "7.19.6",
"@babel/compat-data": "7.19.4",
"@babel/helper-compilation-targets": "7.19.3",
"@babel/helper-create-class-features-plugin":"7.19.0",
"@babel/helper-module-transforms":"7.19.6",

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