ERROR: Could not find definition for module 'Core', (referenced via Target -> Launch.Build.cs -> SessionServices.Build.cs)

The project could not be compiled. Would you like to open it in Xcode?
I am using UE4 in MacBook and Xcode to make my cpp project
error :

Running Mono…

Found mono via known Mono.framework path
Running system mono/msbuild, version: Mono JIT compiler version 6.12.0.90 (2020-02/d3daacdaa80 Thu Jul 30

16:18:06 EDT 2020)
/Users/Shared/Epic Games/UE_4.25/Engine /Users/Shared/Epic Games/UE_4.25/Engine/Binaries/Mac
Creating makefile for killeEditor (no existing makefile)
ERROR: Could not find definition for module 'Core', (referenced via Target -> Launch.Build.cs -> SessionServices.Build.cs)