Cannot find module '@jest/core'

[toanqc]

{ Error: Cannot find module '@jest/core' at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15) at Function.Module._load (internal/modules/cjs/loader.js:562:25) at Module.require (internal/modules/cjs/loader.js:692:17) at require (internal/modules/cjs/helpers.js:25:18) at Object.<anonymous> (D:\projects\wbmi\Personal.Portal.PolicyPortlet\node_modules\gulp-jest\lib\index.js:14:16) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10) at Module.load (internal/modules/cjs/loader.js:653:32) at tryModuleLoad (internal/modules/cjs/loader.js:593:12) at Function.Module._load (internal/modules/cjs/loader.js:585:3) code: 'MODULE_NOT_FOUND' }

I got the above error after clean up the node_modules folder and do npm install. Ther version 4.0.4 got installed and cause the error. Force the application to use 4.0.2 works fine though. Not sure what is the root cause.

When I check jest/core (https://www.npmjs.com/package/@jest/core) I see that they're not recommended to use the library directly. Is this a mistake from the PR or am I missing something?