Kontakt 5 is saying there is “no library found” with Master Sessions: Ensemble Drums
Don’t worry! You have everything you need. Master Sessions: Ensemble Drums is an unwrapped library, and as a result, cannot be added to the library tab in Kontakt (native instruments reserves that section for “wrapped” libraries). To load the nkis, you can add them to your quick load database (drag and drop the library folders into the Quickload window), or simply open from the finder or Kontakt file browser.