You'll see directories for api, appserver , cloudserver , cloudagent and one directory for each node (same as their names)
To download all logs - click the button Download all logs which will generate an archive containing all logs
To download a specific file - browse to the directory and click the name of the log
Note: By downloading logs from WebUI you can also download logs for Storware Backup & Recovery Cloud server and agent
Backup-related logs
Go to the VM details and backup history tab
Click the second icon on the right of the backup you want to collect logs for
Downloaded file is vprotect_daemon.log file filtered, so it should contain only entries related to the tasks of backup/restore operations related to this backup
Directly from the operating system
Storware Backup & Recovery Node
Log files are stored in this folder: /opt/vprotect/logs/<node_name>: