Error: Cannot find module on nodejs v12.16.1 and npm 6.14.4

[nicolicioiul]

nodejs index.js sharenow test s2
internal/modules/cjs/loader.js:324
throw err;
^

Error: Cannot find module '...../node_modules/@maibornwolff/alt-core-js/lib/index'. Please verify that the package.json has a valid "main" entry
at tryPackage (internal/modules/cjs/loader.js:316:19)
at Function.Module._findPath (internal/modules/cjs/loader.js:705:18)
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:969:27)
at Function.Module._load (internal/modules/cjs/loader.js:864:27)
at Module.require (internal/modules/cjs/loader.js:1044:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object. (..../index.js:1:13)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
at Module.load (internal/modules/cjs/loader.js:1002:32) {
code: 'MODULE_NOT_FOUND',
path: '.../node_modules/@maibornwolff/alt-core-js/package.json',
requestPath: '@maibornwolff/alt-core-js'
}