Then you better ask on some site oriented to Raspberry Pi. Like https://raspberrypi.stackexchange.com/
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
Can you connect with any other SSH or SFTP client?
If you select port 80 in WinSCP, it automatically switches to WebDAV protocol.
Make sure you select SFTP protocol afterwards.