NPM Cannot read property '0' of undefined

I had the same problem.

I removed both node_modules and package-lock.json and then did:

npm install 

And it worked.

Edit by @OwlyMoly Due to new updates and the restriction to old dependencies in package-lock.json is causing this conflicts. By doing npm install won't fix this issue. Instead by ditching npm_modules and package-lock.json and doing npm install will load a new node_modules and that supposed to be required by package.json. You have to commit the new package-lock.json along with your latest changes of the project.

Do 2 steps bellow (Window):

rm -rf ./node_modules to remove node folder

rm package-lock.json to remove package-lock.json file

then npm install to re-install the node modules

I've made some tests:

nodejs@8.6.0 npm@5.5.1 - I have trouble and the test fails

nvm use 8.5.0

nodejs@8.5.0 npm@5.5.1 - I have trouble and the test fails

nvm use 8.4.0

nodejs@8.4.0 npm@5.5.1 - I have trouble and the test fails

npm install npm@^5 -g

nodejs@8.4.0 npm@5.4.2 - I have trouble and the test fails

nvm use 8.6.0
npm install npm@^4 -g

nodejs@8.6.0 npm@4.6.1 - no trouble, this fixes it.

Seems to be an issue with a combination of factors.

Some workarounds here:

https://github.com/npm/npm/issues/18238

npm 5.3.0 is broken for windows 10 after upgrading the nodeJS.
You should downgrade the npm, it is a temporary solution but works fine.

npm install -g npm@5.2.0

For me (npm@6.9.0) solved the issue by deleting node_modules and performing npm install, but without removing package.json.lock file.

Try with nvm(Node Version Manager).it help you to install any node version for any project without any Error.

I bumped into this issue using nvs (Node Version Switcher - https://github.com/jasongin/nvs) node@10.15.3 and npm@6.9.0. The reason was a local package I had linked with npm link. The solution was to remove that folder.

In my case reinstalling node_modules have not fixed this issue. Problem was with one *.ts file which was missing in source codes. Do not know why It was not displaying compilation error, but adding this missing file to repository solved this issue.

Upgrading npm to version 7.5.4 did the job for me.

npm install -g npm@latest

Just remove both node_modules and package-lock.json and run: npm install

or

Just run: npm install -g npm@latest to upgrade it to the latest version

What worked for me:
npm ci

Install a project with a clean slate docs: https://docs.npmjs.com/cli/v7/commands/npm-ci

Deletes node_modules and installs everything based on package-lock.json, so no need to regenerate that