The most frequent cause is that the plugin has "lost track" of where its high-quality sample library is stored. This often happens if you move folders or install to a custom external drive.
If none of these work, head to the official Ample Sound forum or support ticket system. Include a screenshot of the error and your file path—they usually reply within 48 hours. ample sound loading samples failed
Remember: Don't panic, don't reinstall Windows, and never delete your sample library manually. Just follow the logic: The most frequent cause is that the plugin