'' is an incorrect path for a scene file. BuildPlayer expects paths relative to the project folder. 에러 해결방법

UnityEditor.BuildPlayerWindow+BuildMethodException: '' is an incorrect path for a scene file. BuildPlayer expects paths relative to the project folder.

  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0021f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:182 

  at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:89 

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

유니티 빌드시 위와같은 에러가 발생하는 경우 file - build setting에 씬 설정하는 부분에 삭제/이동된 된 씬이 참조되어 있는지 확인한다. 있다면 해당 씬 우클릭 삭제, 필요한 씬은 새로 추가