npm start - erro "Cannot find module 'semver'" | JavaScript

Boa tarde, pessoal. Estudando usando o comando npm start e ele retorna com esse erro. Já desinstalei o Node e o NPM, mas não adiantou.
Alguém pode me ajudar por favor?
internal/modules/cjs/loader.js:968
  throw err;
  ^

Error:Boa tarde, pessoal. Estudando usando o comando npm start e ele retorna com esse erro. Já desinstalei o Node e o NPM, mas não adiantou.

Alguém pode me ajudar por favor?

internal/modules/cjs/loader.js:968
  throw err;
  ^

Error: Cannot find module 'semver'
Require stack:
- /usr/share/npm/lib/utils/unsupported.js
- /usr/share/npm/bin/npm-cli.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)
    at Function.Module._load (internal/modules/cjs/loader.js:841:27)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/usr/share/npm/lib/utils/unsupported.js:2:14)
    at Module._compile (internal/modules/cjs/loader.js:1137:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
    at Module.load (internal/modules/cjs/loader.js:985:32)
    at Function.Module._load (internal/modules/cjs/loader.js:878:14)
    at Module.require (internal/modules/cjs/loader.js:1025:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/usr/share/npm/lib/utils/unsupported.js',
    '/usr/share/npm/bin/npm-cli.js'
  ]
}
Require stack:
- /usr/share/npm/lib/utils/unsupported.js
- /usr/share/npm/bin/npm-cli.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)
    at Function.Module._load (internal/modules/cjs/loader.js:841:27)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/usr/share/npm/lib/utils/unsupported.js:2:14)
    at Module._compile (internal/modules/cjs/loader.js:1137:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
    at Module.load (internal/modules/cjs/loader.js:985:32)
    at Function.Module._load (internal/modules/cjs/loader.js:878:14)
    at Module.require (internal/modules/cjs/loader.js:1025:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/usr/share/npm/lib/utils/unsupported.js',
    '/usr/share/npm/bin/npm-cli.js'
  ]
}