Search code examples
node.jsnpmserverless

What does npm ERR! code ELSPROBLEMS mean?

Building a node project, using serverless

Firstly I get the error

Error:
Error: npm ls -prod -json -depth=1 failed with code 1
  at ChildProcess.<anonymous> (/Users/jrobens/NetBeansProjects/azuron/winpay/winpay-

uploader/node_modules/serverless-webpack/lib/utils.js:91:16)

To find our more information I enter npm ls -prod -json -depth=1 and get

npm ERR! code ELSPROBLEMS
npm ERR! invalid: serverless@3.2.1 
/my-project/node_modules/serverless
{

It looks as though webpack worked

webpack compiled successfully in 4581 ms

About the environment: node-14, typescript, aws

├── @serverless/typescript@3.2.0
├── @types/serverless@3.0.0
├── serverless-apigw-binary@0.4.4
├── serverless-certificate-creator@1.6.0
├── serverless-dynamodb-local@0.2.40
├── serverless-http@2.7.0
├── serverless-iam-roles-per-function@3.2.0
├── serverless-plugin-aws-alerts@1.7.4
├── serverless-prune-plugin@2.0.1
├── serverless-s3-local@0.6.21
├── serverless-webpack@5.6.1
Solution

  • Fixing this

    npm ls -prod json

    produces a json list of the packages. The -depth=1 flag brought an error to light. There was an invalid package.

    Find the invalid package by

    npm ls

    and fix any error messages.

    In my case there was an old serverless plugin that had a dependency of a different version of serverless.