Angular cli after update npm start give error

Question

I create application using angular cli and use backend proxy to handle backend and using polymer(vaadin) it work correctly until I update to angular cli 1.0.0-beta.22 it give Er

Answer 1

I have noticed that it sometimes happens when you have an invalid import statement! if for some reason you have deleted a component and you left the import there, then it will give you:

"Tried to find bootstrap code, but could not. Specify either statically analyzable bootstrap code or pass in an entryModule to the plugins options."