Unreal Engine can't complile VS source file [4.25]

Development Pipeline & Plugins Plugins
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1

i used Unreal Engine 4.25.ver to interface ‘RoadRunner’ with ‘Unreal engine’.
after i created file in Unreal engine, i clicked the new C++ class.
and i clicked the parent class , Unreal Interface.
but it can’t complile the project.
how can i complie ?
[4.25]

2

Try right clicking the .uproject → Generate Visual Studio Project Files. That refreshes the .sln with any added/removed C++ files.

You might end up needing to delete the new files for that class and try again.