I’ve been having issues with connecting to SFTP server as well. In my case, I can connect to the server using self-hosted/locally run n8n, however I cannot with n8n Cloud: Issue with FTP/SFTP list files on Cloud vs local community version
For some reason with n8n Cloud, it is returning what looks like an old cached version of the SFTP directory. I cannot for the life of me figure out how to get the uncached/live SFTP server directory list on n8n Cloud.