Fixing mega-sync "Failed to sync folder: Invalid argument" on Ubuntu Containers
When mega-sync fails with the following message: Failed to sync folder: Invalid argument. Unable to retrieve the ID of current device the problem is often not the sync path itself. In my case, the real issue was that the Ubuntu environment deployed inside Docker did not have a valid machine ID. Why This Happens MEGA relies on the current device ID when creating or managing sync relationships. On some minimal Ubuntu container images, /etc/machine-id can be missing or empty. When that happens, mega-sync cannot identify the current device correctly and returns the misleading Invalid argument error. ...