Can't package project anymore, "SlateWrapperTypes.generated.h": No such file or directory

I can’t package my project that worked fine for month anymore, it always gives me the following error:

d:\unrealengine-4.20\unrealengine-4.20\engine\source\runtime\umg\public\Components/SlateWrapperTypes.h(10): fatal error C1083: file can’t be opened: “SlateWrapperTypes.generated.h”: No such file or directory

I am using 4.20 compiled from source and never had the issue before, there is not “SlateWrapperTypes.generated.h”" inside my engine\source\runtime\umg\public\Components folder, how can I fix the issue?