mac os x, ue 4.20.2 - start build but never end

I have project c++ started on ue 4.19 and it works correct. When I moved project to 4.20 something strange began to happen. The project was sometimes built and sometimes it started to build and did not finish and at the same time the processor did not break anything. All the time i see “Compile c++ code …”.

Last line in Output Log is:

Candidate modules for hot reload:
Launching UnrealBuildTool… [/Users/Shared/Epic Games/UE_4.20/Engine/Binaries/DotNET/UnrealBuildTool.exe -ModuleWithSuffix=RTSTest5_420,6606 Mac Development -TargetType=Editor -Project="…/…/…/…/…/…/konrad/Documents/Unreal Projects/RTSTest5_420/RTSTest5_420.uproject" -canskiplink “/Users/user/Documents/Unreal Projects/RTSTest5_420/RTSTest5_420.uproj
ect” ]

I remove temporary files and try to rebuild and did not help.

To test, I create basic c++ project for 4.19 it works (compile after start and recompile) but when I create c++ basic project for 4.20 project not build as my project.
I had problems with 4.20.1 and 4.20.2. The above test was performed for 4.20.1.

When I trie to execute command from Output Low in cmd it return:
sudo: /Users/Shared/Epic Games/UE_4.20/Engine/Binaries/DotNET/UnrealBuildTool.exe: command not found