I have multiple HestiaCP servers and all of them do remote backups to another HestiaCP server (backup server).
Yesterday I upgraded the backup server from 1.8.2 to 1.9.3 and this morning I got a lot of emails with the message “Can’t create temp folder on sftp” from each backup try.
The connection to the backup server is done through SFTP with SSH Key and the connection is established correctly as I can check on the logs but suddenly is closed because cannot access the temp folder.
As per I checked it is using the folder in /srv/jail/user/home/user so the permissions should be incorrect but I am not sure which permission must be fixed to avoid causing other problems.