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Operation was not successful an unknown error occurred Your session may have timed out error in Serv-U

The "Operation was not successful, an unknown error occurred. Your session may have timed out. Please try logging in again" error message usually happens when a user logs in via the web client.

First published date

5/9/2019 9:21 PM

Last published date

3/2/2021 7:09 PM

Overview

The "Operation was not successful, an unknown error occurred. Your session may have timed out. Please try logging in again" error usually happens when a user logs in via the web client. The user can log in fine, but after that, the error shows right away and files are not showing. When you check the Serv-U domain activity session, the user still logged in. It happens after applying the Serv-U 15.1.6 Hotfix 2.

Product section

Serv-U Managed File Transfer & Serv-U FTP Server

Cause

Not all hotfix files were copied
Incorrect hotfix version installed

Resolution

Upgrade Serv-U to the latest version
Re-install Serv-U

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