Error: [$injector:modulerr] Failed to instantiate module app due to:
[$injector:nomod] Module 'app' is not available! You either misspelled the
module name or forgot to load it. If registering a module ensure that you
specify the dependencies as the second argument.
http://errors.angularjs.org/1.6.5/$injector/nomod?p0=app
https://localhost:8080/libs/angular/angular.js:2299:71
ensure@https://localhost:8080/libs/angular/angular.js:2218:45
module@https://localhost:8080/libs/angular/angular.js:2295:20
https://localhost:8080/libs/angular/angular.js:4933:35
forEach@https://localhost:8080/libs/angular/angular.js:410:24
loadModules@https://localhost:8080/libs/angular/angular.js:4917:12
createInjector@https://localhost:8080/libs/angular/angular.js:4839:30
doBootstrap@https://localhost:8080/libs/angular/angular.js:1949:34
bootstrap@https://localhost:8080/libs/angular/angular.js:1970:23
angularInit@https://localhost:8080/libs/angular/angular.js:1855:14
https://localhost:8080/libs/angular/angular.js:33826:16
trigger@https://localhost:8080/libs/angular/angular.js:3468:7