can not open source file "Blueprint/UserWidget.h"

[StarlinGele]

i practice the demo HowTo_UMG. but my

#include "Blueprint/UserWidget.h"

console say : can not open source file “Blueprint/UserWidget.h”
and my UUserWidget* CurrentWidget; is undifineded!
how to do? thank you!

[StarlinGele]

just like this!

[SolidGasStudios]

Here: what-header-file-do-i-include-to-access-uuserwidge
and here: Extend_UserWidget_for_UMG_Widgets