03_BuildingEscape | simple First Person game to learn level building | Game Engine library

Before you go too far down the rabbit hole, check to be sure your operating system doesn't simply have a lock on one of your intermediate files. If you delete the entire contents of D:\Unreal Projects\03_BuildingEscape\BuildingEscape\Intermediate\ before rebuilding, that will ensure that you're not simply looking at a locked or corrupt intermediate. This isn't guaranteed to be the issue, but bad intermediates can cause otherwise inexplicable build errors, so clearing them can at least narrow down the range of possible causes you'll need to investigate. Of course make sure your editor isn't running, or running as a stuck process, while you're trying to rebuild.