Hey, I have always message “Packaging failed!” after build successful, which is weird, cos it’s builded successfuly already…
I created blank default blueprint project, pressed build and after message “build successful” (0 errors) unknown error pops out. Funny part is that it’s only an error, build works great o_O
development/shipping build doesn’t matter
bump
on 4.21.1 still the same, any warnings and errors, build successful but still error occures after build
found a solution, this strange error after successful build was caused by "The system cannot find the path specified.” in cmd
after solution from:
no longer error after build rofl 
You’re my hero, you just fixed both this error and an error while executing batch files for me with this, thanks a lot.
