~/Scripts/app/app.bindings.js

in file BundleConfig.cs in folder App_Start the item "~/Scripts/app/app.bindings.js" is configured but physically not existent in folder Scripts/app. Therefore I removed it from the bundles.Add routine.

The SPA still works fine after that micro refactoring.

before:
   
bundles.Add(new ScriptBundle("~/bundles/app").Include(
"~/Scripts/app/ajaxPrefilters.js",
"~/Scripts/app/app.bindings.js",
"~/Scripts/app/app.datamodel.js",
"~/Scripts/app/app.viewmodel.js",
"~/Scripts/app/home.viewmodel.js",
"~/Scripts/app/login.viewmodel.js",
"~/Scripts/app/register.viewmodel.js",
"~/Scripts/app/registerExternal.viewmodel.js",
"~/Scripts/app/manage.viewmodel.js",
"~/Scripts/app/userInfo.viewmodel.js",
"~/Scripts/app/_run.js"));

after:

bundles.Add(new ScriptBundle("~/bundles/app").Include(
"~/Scripts/app/ajaxPrefilters.js",
"~/Scripts/app/app.datamodel.js",
"~/Scripts/app/app.viewmodel.js",
"~/Scripts/app/home.viewmodel.js",
"~/Scripts/app/login.viewmodel.js",
"~/Scripts/app/register.viewmodel.js",
"~/Scripts/app/registerExternal.viewmodel.js",
"~/Scripts/app/manage.viewmodel.js",
"~/Scripts/app/userInfo.viewmodel.js",
"~/Scripts/app/_run.js"));