Keyboard-interactive authentication failed

Hello ,

We have a trouble with a new script we can't loging.
I have some special carracteres on password and i receive a error message :

Version if WinSCP:5.15.5
End of log:

. 2019-10-17 15:18:59.313 Prompt (keyboard interactive, "SSH server: Password authentication", "Using keyboard-interactive authentication.", "Password: ")
. 2019-10-17 15:18:59.313 Using stored password.
. 2019-10-17 15:19:02.360 Keyboard-interactive authentication failed
! 2019-10-17 15:19:02.360 Access denied
. 2019-10-17 15:19:02.360 Server offered these authentication methods: publickey,gssapi-with-mic,keyboard-interactive,password
. 2019-10-17 15:19:02.360 Attempting keyboard-interactive authentication
. 2019-10-17 15:19:02.391 Prompt (keyboard interactive, "SSH server: Password authentication", "Using keyboard-interactive authentication.", "Password: ")
. 2019-10-17 15:19:02.391 Disconnected: Unable to authenticate

Thanks for your help

Can you login in WinSCP GUI?

Did you try getting the GUI to generate the script for you?
https://winscp.net/eng/docs/ui_generateurl#script

Also make sure your script uses UTF-8 encoding.
https://winscp.net/eng/docs/scripting#using_scripting