Error: Cannot find module 'protagonist'

module.js:327
throw err;
^

Error: Cannot find module 'protagonist'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (/root/.nvm/versions/node/v4.5.0/lib/node_modules/.aglio_npminstall/node_modules/.2.2.1@aglio/lib/main.js:9:17)
at Object. (/root/.nvm/versions/node/v4.5.0/lib/node_modules/.aglio_npminstall/node_modules/.2.2.1@aglio/lib/main.js:220:4)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)

The stack trace points to lib/main.js, including the require near line 9, in the installed Aglio package. Start by reproducing the missing-module error and inspecting how that module is resolved; done means Aglio loads without the “Cannot find module 'protagonist'” failure.

Written by the indexing model from the issue text.