- Plesk Onyx for Windows
While transferring files via FTPS with TLS, an error occurs:
Response: 550 The supplied message is incomplete. The signature was not verified.
Error: File transfer failed
Message-handling issue in TLS 1.2
In order to solve this issue, perform the following actions:
- Depending on the Windows server version, apply the hot fix by following this article: FIX: "The supplied message is incomplete"
- Install last Windows Server updates in System > Windows Update
- Reboot the system