Angular CLI ERROR in Cannot read property 'loadChildren' of null

Question

I\'m converting a project to use angular cli and everything is working (once it\'s build) but i\'ve got a weird behaviour during build.

with ng serve I

Answer 1

in my case I have faced it when tried to concat one routes array to another:

export const businesslogicState: Routes = BUSINESSLOGIC_ROUTES.concat(gamesRoutes);

each parts of concat were Route[]

changing one element array gamesRoutes to Route object itself didn't help, still getting the same error.