This problem is occurring with multiple levels of students in a school setting.
Level starts to show in editor before crash.
In a school setting using Unreal Engine 4.12
before, the Unreal engine 4 crash reporter, there are a few messages…
An Unreal process has crashed: UE4-level01
Upon open, message box:
Serialization Error : Action Needed
“Corrupt data found, please verify your installation.”
Doing nothing, the system displays Initializing Asset Discovery with a progress bar (barbershop pole sideways in light and dark grey)
Project files showing as 1KB. for example: (Level01.uproject)