TypeError ERR INVALID ARG TYPE The path argument must be of type string Received type undefined raised when starting react app

Question

I m working on a project in React and ran into a problem that has me stumped   Whenever I run yarn start I get this error       TypeError  ERR INVALID ARG TYPE   The  path  argument must be of type   string  Received type undefined   I have no idea why this is happening  if anyone has experienced this I would be grateful

User · Answer

I fixed this issue by setting a newer version of node as default in nvm i e   nvm alias default 12 XX X

User · Answer

Just need to remove and re-install react-scripts To Remove yarn remove react-scripts To Add yarn add react-scripts and then rm -rf node modules  yarn lock  amp  amp  yarn  Remember don t update the react-scripts version maually

User · Answer

To fix this issue simply upgrade react-scripts package  check latest version with npm info react-scripts version     Replace in your package json  react-scripts     3 x x  with  react-scripts     3 4 1   or the latest available version   optional for some  Delete your node modules folder Run npm install or yarn install   Some people reported that this issue was caused by running npm audit fix  avoid it

User · Answer

Go to you package json Change  react-scripts    3 x x  to  react-scripts     3 4 0  in the dependencies Reinstall react-scripts  npm I react-scripts Start your project  npm start

User · Answer

None of the other solutions worked for me  However  adding this to my package json fixed the issue for me   quot resolutions quot        quot react-dev-utils quot    quot 10 0 0 quot

User · Answer

I had the same issue running it in my pipeline  For me  the issue was that I was using node version v10 0 0 in my docker container  Updating it to v14 7 0 solved it for me

User · Answer

Setting the HOME environment variable to an appropriate value fix this issue for me

User · Answer

I ve also faced this problem and figure out it by upgrading the react-scripts package from  quot react-scripts quot    quot 3 x x quot  to  quot react-scripts quot    quot  3 4 1 quot   or the latest available version    Delete node modules  folder Delete package-lock json file Rewrite the package json file from  quot react-scripts quot    quot 3 x x quot  to  quot react-scripts quot    quot  3 4 1 quot  Install node packages again npm i Now  start the project npm start  And it works

User · Answer

I didn t want to upgrade react-scripts  so I used the 3rd party reinstall npm module to reinstall it  and it worked  npm i -g npm-reinstall reinstall react-scripts

User · Answer

Running npm i react-dev-utils 10 0 0 solved my issue

User · Answer

If you have ejected  this is the proper way to fix this issue    find this file config webpackDevServer config js and then inside this file find the following line   app use noopServiceWorkerMiddleware       You should change it to    app use noopServiceWorkerMiddleware          For me and probably most of you  the service worker is served at the root of the project  In case it s different for you  you can pass your base path instead

User · Answer

In my case  it was because I  at one point  had reactn installed  which also includes its own version of React  for some reason    After that had been installed  even after uninstalling again   this error occured   I simply removed node modules and ran npm install again  and it worked

User · Answer

I just had this issue after installing and removing some npm packages and spent almost 5 hours to figure out what was going on    What I did is basically copied my src components in a different directory  then removed all the node modules and package-lock json  if you are running your app in the Docker container  remove images and rebuild it just to be safe   then reset it to my last commit and then put back my src components then ran npm i   I hope it helps

User · Answer

We ejected from react-scripts and so could not simply upgrade the package json entry to fix this    Instead  we did this   1   in a new directory  create a new project -    gt  npx create-react-app foo-project  2   and then eject it -  cd   foo-project  amp  amp  npm run eject  3   now copy the files from  foo-project config into the config directory of our main app and fire up your dev server   hope this helps others in a similar bind

User · Answer

If you have an ejected create-react-app  I would suggest    Create a new React app through create-react-app  Eject it through npm run eject or yarn eject  Install all the packages that are missing from the package json  Copy your src folder assuming all your code is situated in this folder  Redo your changes on the config and script folders  if needed    Worked for me

User · Answer

Follow the below steps  I also encountered the same problem    remove the whole node modules folder  remove the package-lock json file  run command npm install npm-install as shown in the image    Here we go   npm start   wao

User · Answer

If you ejected and are curious  this change on the CRA repo is what is causing the error   To fix it  you need to apply their changes  namely  the last set of files    packages react-scripts config paths js packages react-scripts config webpack config js packages react-scripts config webpackDevServer config js packages react-scripts package json packages react-scripts scripts build js packages react-scripts scripts start js   Personally  I think you should manually apply the changes because  unless you have been keeping up-to-date with all the changes  you could introduce another bug to your webpack bundle  because of a dependency mismatch or something    OR  you could do what Geo Angelopoulos suggested  It might take a while but at least your project would be in sync with the CRA repo  and get all their latest enhancements

User · Answer

I tried various approach described above but none of them worked since I have ejected my css  Finally applying following steps helped    Upgradereact-scripts from  react-scripts    3 x x  to  react-scripts     3 4 0  Downgrading react-dev-utils form  react-dev-utils     10 x x  to  react-dev-utils    10 0 0  Delete node-modules folder and package-lock json yarn lock Reinstall packages npm install yarn install

User · Answer

Simply update react-scripts to the latest version  yarn add react-scripts latest  OR IF USING NPM npm install react-scripts latest

[javascript] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined raised when starting react app

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