EDIT: My apologies, this occurred due to changes in ustruct used in blueprints. Compilation works with VS2017.
The QFE didn’t work for me either: VisualStudio.15.Release/15.2.0+26430.16 (VS2017 Community) still getting
UnrealHeaderTool failed for target 'TestProjectEditor' (platform: Win64, module info: TestProjectPath\Intermediate\Build\Win64\TestProjectEditor\Development\TestProjectEditor.uhtmanifest, exit code: OtherCompilationError (5)).
Fresh UE4.17 install, no plugins, C++ project.