create-react-app not working due to postcss

Question

I am currently learning react, and started a new app with create-react-app.

I navigated into the new app, then ran npm start.

I got this error message:

Error: Cannot find module '~/Desktop/forms-test/node_modules/postcss-safe-parser/node_modules/postcss/lib/tokenize'
    at createEsmNotFoundErr (internal/modules/cjs/loader.js:907:15)
    at finalizeEsmResolution (internal/modules/cjs/loader.js:900:15)
    at resolveExports (internal/modules/cjs/loader.js:432:14)
    at Function.Module._findPath (internal/modules/cjs/loader.js:472:31)
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:867:27)
    at Function.Module._load (internal/modules/cjs/loader.js:725:27)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (~/Desktop/forms-test/node_modules/postcss-safe-parser/lib/safe-parser.js:1:17)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)

Any help would be very useful.

I am running Mac OS Catalina, using npm, and running zsh. I am using node version 14.13.1

I suggest to install your dependencies again which would help — tmhao2005, Nov 05 '20 at 17:05
If you use npm, `npm i`. Or using yarn, just simply run `yarn` — tmhao2005, Nov 05 '20 at 17:07
Didn't you check if file `node_modules/postcss/lib/tokenize.js` is now existed? — tmhao2005, Nov 05 '20 at 17:10
@tmhao2005 No, I am just testing react for myself. I made no modifications after running the command. I will put more details in the question. — nph, Nov 05 '20 at 17:15
I fixed the problem, somehow. I changed the `postcss` dependency in `postcss-safe-parser` to `8.1.4` and back to `8.1.0` and that fixed the problem. — nph, Nov 05 '20 at 17:49

score 0 · Answer 1 · answered Oct 25 '21 at 03:27

For others digging around, I followed the instructions on this answer.

rm yarn.lock
yarn install

And that reinstalled everything and properly exported the lib/tokenize path inside of node_modules/postcss-safe-parser/node_modules/postcss/package.json.

create-react-app not working due to postcss

1 Answers1