RoboTask forum

Hey,

Having a new issue where one of our SFTP connections are failing.

E: 11/4/2025 1:30:44 PM: Can't open SFTP session
E: 11/4/2025 1:30:44 PM: FATAL ERROR: Couldn't agree a client-to-server cipher (available: aes128-gcm@openssh.com,aes256-gcm@openssh.com)

It happens a few times throughout the day and other times during the day there are no issues.

I created a putty profile and moved some of the other ciphers down to warn below but it doesn't seem to help. Am I not doing it right or is there something else I can do different? I included a screenshot of the putty config for the ciphers and then a pic to show that the SFTP connection has the profile selected

Try to update PSFTP.EXE module.
We are currently using PSFTP.EXE version 0.76 in installation package.
The PUTTY package is now at version 0.83, released on 2025-02-08 (see here).
This may help.
In the next release, we will update PSFTP.EXE to the latest version.

Otherwise you need to reconfigure your SSH server. For example see here