Error pressing F5

[MaxiAringoli]

Hi, i have an error after build project, works fine but when i press F5 i recieve "entry not found" or "404" on your demo. Have you notice this?

[angularjava3]

use it in your app-routing.module.ts
try it
@NgModule({
imports: [RouterModule.forRoot(routes, {useHash:true})],
exports: [RouterModule]})