Problem with packaging a 4.16.1 project to windows 64bit

Hello I have a problem with a finale packaged project, witch when I start the Project is only print an
error (Failed to open descriptor file ../../../BlockRunner_2/ BlockRunner_2.uproject.
In the Editor it runs all fine but it only shows with all the packaged project. Even when I set the build configuration to Developer it makes the same error. So if some one have found a solution for the error, or have an idea what I am doing wrong would be great to let me now.

Thanks for the Help.