Warning: Failed to load process type

I’m getting this warning for the past two backups-

  • 2020-08-07 02:00:00 -04 - [Warning-Duplicati.Library.DynamicLoader.DynamicLoader`1-SoftError]: Failed to load process type Duplicati.Library.Common.IO.VssBackupComponents assembly /Applications/Duplicati.app/Contents/Resources/Duplicati.Library.IO.dll, error message: Could not load type of field ‘Duplicati.Library.Common.IO.VssBackupComponents:_vssBackupComponents’ (1) due to: Could not load file or assembly ‘AlphaVSS.Common, Version=, Culture=neutral, PublicKeyToken=959d3993561034e3’ or one of its dependencies.

I have no idea what this means?

Are you using Linux? Also what version of Duplicati?

Sounds like the issue discussed here:

I’m running Duplicati on macOS Catalina. Version =

Could be the same issue. It is benign and can be ignored. Mac and Linux don’t need to load the VSS libraries anyway (it’s a Windows-only requirement).

I can confirm that it’s the same issue, with the same solution (adapted for macOS):

  1. Download the ZIP of the latest release here
  2. Extract AlphaVSS.Common.dll to /Applications/Duplicati.app/Contents/Resources/AlphaVSS.Common.dll

Now my syncs do not give me this warning anymore (on macOS Catalina 10.15.7).