When you search for "download unreal engine 4.27 offline installer," Google will present dozens of shady websites: ue4installerfree.com , downloadunrealarchive.org , etc.
You only copied the launcher metadata, not the engine. Go back to the master machine and ensure you copy C:\Program Files\Epic Games\UE_4.27 , not the launcher's cache folder. download unreal engine 4.27 offline installer
Automated build machines (Jenkins, TeamCity, GitLab CI) cannot log into a GUI launcher. They require a command-line deployment using the offline installer methodology. When you search for "download unreal engine 4
Paste UE_4.27 into C:\Program Files\Epic Games\ on the target machine. download unreal engine 4.27 offline installer