It would appear that a filename has been changed with the Excalibur,
without updating the AppArmor profile.

was: /etc/papersize

is: /etc/paperspecs


Daedalus:

cat /etc/os-release
PRETTY_NAME="Devuan GNU/Linux 5 (daedalus)"

$ ls /etc/papersize

/etc/papersize

$ls /etc/paperspecs

ls: cannot access '/etc/paperspecs': No such file or directory

$ grep paper /etc/apparmor.d/usr.sbin.cupsd
  /etc/papersize r,
  /etc/papersize r,

Excalibur:

$ cat /etc/os-release
PRETTY_NAME="Devuan GNU/Linux 6 (excalibur)"

$ ls /etc/papersize
ls: cannot access '/etc/papersize': No such file or directory

$ ls /etc/paperspecs
/etc/paperspecs

$  grep paper /etc/apparmor.d/usr.sbin.cupsd
  /etc/papersize r,
  /etc/papersize r,

Regards,

Ken