Failed to Save Stream

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.4

Error message:
Failed to Save Stream

Stack trace:
(00257D15)
(00748748)
(0074884C)

Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.