Função router de Petshop Gatito

Bom dia,

Estou com problemas em avançar com a execução desse script.

PS D:\Alura\semana-11> node api/index.jsinternal/modules/cjs/loader.js:905 throw err; ^

Error: Cannot find module 'jsontoxml' Require stack:

• D:\Alura\semana-11\api\Serializador.js
• D:\Alura\semana-11\api\index.js at Function.Module.resolveFilename (internal/modules/cjs/loader.js:902:15) at Function.Module.load (internal/modules/cjs/loader.js:746:27) at Module.require (internal/modules/cjs/loader.js:974:19) at require (internal/modules/cjs/helpers.js:101:18) at Object. (D:\Alura\semana-11\api\Serializador.js:2:19) at Module.compile (internal/modules/cjs/loader.js:1085:14) at Object.Module.extensions..js (internal/modules/cjs/loader.js:1114:10) at Module.load (internal/modules/cjs/loader.js:950:32) at Function.Module.load (internal/modules/cjs/loader.js:790:12) at Module.require (internal/modules/cjs/loader.js:974:19) { code: 'MODULENOT_FOUND', requireStack: [ 'D:\Alura\semana-11\api\Serializador.js', 'D:\Alura\semana-11\api\index.js' ] }