TaskSwitchXP fails to render previews of windows

According to the author:

TaskSwitchXP provides the same functionality as the existing application switching mechanism in Windows XP today. In addition to displaying an icon list, however, the application will also show a thumbnail preview of the window that will be switched to.

Reference: https://sourceforge.net/projects/taskswitchxp/

Version: Latest on SF: 2.0.11

Expected:

Actual:
Failed to take screenshot. The preview image on the left hand side is not rendered.