UE4 plug-in reports an error cannot open include file: 'modulemanager H 'resolve

Sum up from ：https://answers.unrealengine.com/questions/828532/package-plugin-failed-420.html?sort=oldest

stay UE4 When some low version plug-ins are upgraded to high version , If this plug-in refers to a model class ,

There will be an error  fatal error C1083: Cannot open include file: 'ModuleManager.h': No such file or directory

reason ：

4.20 after ModuleManager.h The location has been changed to Modules/ModuleManager.h

resolvent ：

Will report the wrong place

#include "ModuleManager.h"

It is amended as follows ：

 #include "Modules/ModuleManager.h"

recompile , that will do .