4.7 p8 - UHT fails with error code: -1073741819

hello, i have this problem on 4.81…
i started on 4.2 or earlier and i followed the advice to create from scratch (just copy the code over to a blank 4.81 project)

now i have this compile error… any help appreciated
no LocMacros and no GENERATED_UINTERFACE_BODY

my class has GENERATED_UCLASS_BODY()