I've tried to make just an ordinary notepad file as .zip, then WinSCP says it's not valid. Seems to me that WinSCP actively tends to do something with zip files.
How to avoid this? Or is it simply a bug?
I've tried this in 2 completely different scenarios. I've disabled the Virus scanner in both environments.
I've attached the error message I get running the scripts the second time as well as the scripts.