TypeError: Cannot read property 'replace' of undefined
   at escapeJSONString (/usr/src/node_modules/fastboot/src/ember-app.js:417:17)
   at createShoebox (/usr/src/node_modules/fastboot/src/ember-app.js:394:17)
   at EmberApp.visit (/usr/src/node_modules/fastboot/src/ember-app.js:329:9)
   at runMicrotasks (<anonymous>)
   at processTicksAndRejections (internal/process/task_queues.js:95:5)
   at FastBoot.visit (/usr/src/node_modules/fastboot/src/index.js:86:18)
   at /usr/src/node_modules/fastboot-express-middleware/src/index.js:33:20