Today a testplay failed, because the game didn't run on the testers device.
After some debugging (thx) it turned out that very important parts of the downloaded zip were missing.
I'm not sure if the tester deleted the files or an antivirus deleted them for some reason. I'm very sure that the files were there when the zip left the server.
This is the second time something went wrong with unzipping the archive.
We agreed to continue testing when steam is ready.
