erro ao executar npm start

Estou tendo problemas onde é necessário executar a aplicação no npm. Ao executar o npm start na pasta do assistant-simple ocorre este erro:

Error: Cannot find module 'range-parser'
    at Function.Module._resolveFilename (module.js:547:15)
    at Function.Module._load (module.js:474:25)
    at Module.require (module.js:596:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (C:\Users\Ga_Ca\Documents\Alura\Chatbot\assistant-simple-master\assistant-simple-master\node_modules\send\index.js:27:18)
    at Module._compile (module.js:652:30)
    at Object.Module._extensions..js (module.js:663:10)
    at Module.load (module.js:565:32)
    at tryModuleLoad (module.js:505:12)
    at Function.Module._load (module.js:497:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! assistant-simple@0.1.1 start: `node server.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the assistant-simple@0.1.1 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Ga_Ca\AppData\Roaming\npm-cache\_logs\2018-04-24T18_32_27_913Z-debug.log