The build is failing because it is trying to copy artifacts that don't exist.

However, the copy task that is attempted by the builder is a old configuration and has already been removed from the configuration.

The steps to reproduce are:

1. Create a build artifact copy task that is known to fail.
2. Kick off a build
3. Delete the task from the configuration
4. Kick off another build

Somehow the task remains persisted although it has been removed from the GUI.