I can't slove this problem. My npx create-react-app and npm start don't work

Question

when i try to create a react app by npx create-react-app my-app then throw me this error -

npm ERR! Cannot read properties of null (reading 'pickAlgorithm')

npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\Tech Point\AppData\Local\npm-cache_logs\2021-12-28T05_28_34_105Z-debug-0.log

Deleting generated file... package.json Deleting my-app5/ from C:\Users\Tech Point Done.

Please specify your problem. Not able to understand what you have asked — Gautam Kothari, Dec 28 '21 at 06:01
Reinstall your `node` and `npm` using `nvm`. This link is useful https://stackoverflow.com/questions/70418210/node-installation-messed-up-on-macos/70418290#70418290 — Reza Ghorbani, Dec 28 '21 at 06:33
Here is something very similar asked before: [enter link description here](https://stackoverflow.com/questions/69567381/getting-cannot-read-property-pickalgorithm-of-null-error-in-react-native) — Kiana Kazeminejad, Jan 04 '22 at 13:26
Please provide enough code so others can better understand or reproduce the problem. — Community, Jan 05 '22 at 16:40

score 1 · Answer 1 · answered Dec 28 '21 at 07:53

1

Try the following -

If the above steps don't work then try the following -

Upgrade the NPM version to v7.23.0 or the latest stable version and do npm install.

The upgrade step was taken from this Solution.

answered Dec 28 '21 at 07:53

maxagno3

when i use npm cache clear --force this (npm WARN using --force Recommended protections disabled.) is the result . What can I do now? – Najmus Sayam Dec 28 '21 at 18:42
try using `npm cache clean --force` – maxagno3 Dec 29 '21 at 07:50

score 0 · Answer 2 · edited Jan 11 '22 at 03:28

0

Had a similar issue recently. Which Node version are you currently using?

npx create-react myapp worked when I upgraded from Node 12.22.7 to Node 16.13.1 .

Simply switching to Node version 14.0.0 or higher and npm 5.6 or higher should do the trick.

edited Jan 11 '22 at 03:28

Peter Csala

answered Jan 10 '22 at 20:56

sandramsc

score -1 · Answer 3 · answered Apr 04 '22 at 14:39

-1

check your internet connection then try again "npm create-react-app" command this thing worked in my case.

answered Apr 04 '22 at 14:39

nikhil punse

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Apr 04 '22 at 16:13

3 Answers3