This is our backup application and it is not working without udisks2
"An AppArmor policy prevents this sender from sending this message to this recipient; type=
“method_call", sender=":1.507" (uid=1000 pid=45618 comm="/snap/kbackup/26/usr/bin/kbackup
" label="snap.kbackup.kbackup (enforce)") interface="org.freedesktop.DBus.Introspectable
" member="Introspect" error name="(unset)" requested_reply="0" destination="org.freede
sktop.UDisks2" (uid=0 pid=2059 comm="/usr/libexec/udisks2/udisksd" label="unconfined")”