SSH connection failing randomly through the day

[Dylan022]

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