Build test, all of a sudden not working on one project

Build Environment
1

I have a basic build test that I use across multiple projects. But all of a sudden it’s no longer working on one of my projects. Any assistance would be appreciated.

version: 2 
jobs: 
  build: 
    working_directory: ~/mern-starter 
    docker: 
      - image: circleci/node:10.14.1 
      - image: mongo:3.4.4 
    steps: 
      - checkout 
      - run:
          name: update-npm
          command: 'sudo npm install -g npm@latest'
      - restore_cache: 
          key: dependency-cache-{{ checksum "package.json" }}
      - run:
          name: install-npm
          command: npm install
      - save_cache: 
          key: dependency-cache-{{ checksum "package.json" }}
          paths:
            - ./node_modules
      - run: 
          name: test
          command: npm test
      - store_artifacts: 
          path: test-results.xml
          prefix: tests
      - store_artifacts:
          path: coverage
          prefix: coverage
      - store_test_results:
          path: test-results.xml
2

Issue Resolved.

npm ERR! 404 Not Found: event-stream@3.3.6

npm removed a vulnerable package event-stream@3.3.6. This caused the error.

Resolved by running npm install and then updating npm via prompt. Lastly run npm update to ensure outdated packages are removed from the package.lock file.