Server refused public-key

WinSCP 5.1.71

Server Refused public-key signature despite accepting key.

Create the public and private key like always and have multiple sites setup this way using WinSCP but this new one fails.

WinSCP 5.1 is over 10 years old. Please upgrade first. If it does not help, please post session log file. And more details about your server and how you setup the key.