Error returning a level sequencer player variable

[Wojtt]

As it was suggested here:

Is there a way to trigger a level sequence in C++?

you need to add MovieScene and LevelSequence to PublicDependencyModuleNames, which could look like this:

PublicDependencyModuleNames.AddRange(new string[] { “Core”, “CoreUObject”, “Engine”, “InputCore”, “HeadMountedDisplay”, “UMG”, “LevelSequence”, “MovieScene”});