spring boot gradle intellij - błąd w przy tworzeniu projektu

Błąd jest z uruchomieniem projektu. Nic w nim nie zmieniałem. Próbuję wygenerować go jak w tutorialu https://www.youtube.com/watch?v=lst3Sh4QykM&index=2&list=PLU2dl_1LV_STR4IV60K_6wKBJpVkIHEiY

log z intellij

Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
	at com.example.DemoApplication.main(DemoApplication.java:10)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 6 more