libaacs0 not found by various media players

[Thomas Schweikle]

libaacs0 :amd64 is installed, but not accessed or not found or not the version installed players need.

vlc:
VLC media player 4.0.0-dev Otto Chriek (revision 4.0.0~rc1~~git20211228+r90436+274~ubuntu21.10.1)
[00007fff718078c8] main generic error: cannot load plug-in /usr/lib/x86_64-linux-gnu/vlc/plugins/libaccess_bittorrent_plugin.so: unknown version or not a plug-in
[000055a85db58550] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
keydbcfg.c:680: No valid AACS configuration files found
aacs.c:121: No usable AACS libraries found!
dec.c:197: aacs_open() failed: -2!
keydbcfg.c:680: No valid AACS configuration files found
aacs.c:121: No usable AACS libraries found!
dec.c:197: aacs_open() failed: -2!
[00007f9704000f20] libbluray access: First play: 1, Top menu: 1
HDMV Titles: 300, BD-J Titles: 0, Other: 0
[00007f9704000f20] dvdnav access error: DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
[00007f9704000f20] dvdnav access error: vm: vm: failed to read VIDEO_TS.IFO

same for vlc 3.x:
LC media player 3.0.16 Vetinari (revision 3.0.13-8-g41878ff4f2)
[000055a66a68c580] main libvlc: VLC wird mit dem Standard-Interface ausgefhrt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 797, resource id: 12585618, major code: 40 (TranslateCoords), minor code: 0
keydbcfg.c:680: No valid AACS configuration files found
aacs.c:121: No usable AACS libraries found!
dec.c:197: aacs_open() failed: -2!
keydbcfg.c:680: No valid AACS configuration files found
aacs.c:121: No usable AACS libraries found!
dec.c:197: aacs_open() failed: -2!
[00007f6e24001160] libbluray demux: First play: 1, Top menu: 1
HDMV Titles: 300, BD-J Titles: 0, Other: 0
[00007f6e24001160] dvdnav demux error: DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
[00007f6e24001160] dvdnav demux error: vm: vm: failed to read VIDEO_TS.IFO

libaacs0 is indeed installed:
ii libaacs0:amd64 0.9.0-2 [...]

and config files are installed too:
$ ll ~/.config/aacs/
total 9.5M
drwxrwxr-x 2 tps tps 4.0K Nov 30 2019 ./
drwx------ 152 tps tps 4.0K Dec 29 18:41 ../
-rw-rw-r-- 1 tps tps 9.5M Nov 30 2019 keycd.cfg

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: libaacs0 0.9.0-2
ProcVersionSignature: Ubuntu 5.13.0-23.23-generic 5.13.19
Uname: Linux 5.13.0-23-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Fri Dec 31 09:07:38 2021
InstallationDate: Installed on 2011-10-19 (3725 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: libaacs
UpgradeStatus: Upgraded to impish on 2019-04-27 (978 days ago)