Error: Cannot find module 'call'

[edwardsmarkf]

hello - the trails-example-app is throwing this error:

$ npm start

trails-example-app@0.0.0 start /home/mark/trails-example-app/trails-example-app
node server.js

module.js:529
throw err;
^

Error: Cannot find module 'call'
at Function.Module._resolveFilename (module.js:527:15)
at Function.Module._load (module.js:476:23)
at Module.require (module.js:568:17)
at require (internal/module.js:11:18)
at Object. (/home/mark/trails-example-app/trails-example-app/node_modules/trailpack-router/lib/util.js:2:14)
at Module._compile (module.js:624:30)
at Object.Module._extensions..js (module.js:635:10)
at Module.load (module.js:545:32)
at tryModuleLoad (module.js:508:12)
at Function.Module._load (module.js:500:3)
at Module.require (module.js:568:17)
at require (internal/module.js:11:18)
at Object. (/home/mark/trails-example-app/trails-example-app/node_modules/trailpack-router/lib/index.js:2:16)