VLC media player is one of the most popular media players on the Windows platform.
Now, read this post fromMiniToolto find the feasible fix.
This issue can be found on Windows 7, Windows 8, and Windows 10.
Besides, the error alert reportedly appeared in multiple VLC versions.
This file is required for libaacs library.
Therefore, the standard libbluray library is not enough to play these disks.

Regardless of your system and VLC architecture, you oughta obtain the same key database (KEYDb.cfg) file.
Then, you’re free to start to fix the issue.
Step 3: CopyKEYDB.cfgto the clipboard.
Then, useFile Explorerto navigate.
Step 6: kick off the newly created aacs folder and paste theKEYDB.cfgfile.
Navigate to your download folder and copy the libaacs.dll file to the clipboard.
Step 7: Use File Explorer to navigate to the location where VLC is installed and paste it here.
So it’s possible for you to try the method if you are troubled with this error.