I believe this may be an issue with OPNsense version 25.7.x. In the past, I successfully set this up with the documentation & it was working as of OPNsense version 25.1.7, but on a brand new install of 25.7.x on brand new hardware, it will not work. I'm also constantly met with "Saved settings, but remote backup returned no files."
I'm still using the same Nextcloud server which my other OPNsense router (now on 25.7.2) still is able to backup to, but the fresh 25.7.2 install is experiencing what the original poster is also experiencing.
Here is the source code for this plugin if anyone has any ideas on how to fix it.
https://github.com/opnsense/plugins/tree/master/sysutils/nextcloud-backup
Quote from: petersrin on July 26, 2025, 05:34:01 AMSystem > Logs > General shows various errors:I'm getting the same error log message as you are, yet I can also manually reach the Nextcloud instance.
`Error while fetching filelist from Nextcloud '/.' path`
`Check Nextcloud configuration parameters`
I'm still using the same Nextcloud server which my other OPNsense router (now on 25.7.2) still is able to backup to, but the fresh 25.7.2 install is experiencing what the original poster is also experiencing.
Here is the source code for this plugin if anyone has any ideas on how to fix it.
https://github.com/opnsense/plugins/tree/master/sysutils/nextcloud-backup