After new Plesk Obsidian update to 18.0.52, there is an issue managing backups using Dropbox.
The following message are shown while trying to save the backup on remote Dropbox:
ERROR: () Unable to create the remote backup: <unspecified file>(1): expected value
WARNING: () Unable to delete the incomplete remote backup. Error: Failed to exec pmm-ras: Exit code: 1: <unspecified file>(1): expected value
- It affects both Windows and Linux OSs.
EXTPLESK-4582 "Error performing server backup or restore from Dropbox"
- Dropbox Backup 4.2.4-65 1 May 2023.
If update is not possible for some reason you may use local storage for backups.