Asterisk 14.0.0.2 conference woes

I’m trying to get conference bridge working in Asterisk 14.0.2. I’m getting the follow errors. This worked fine out of the box in 11.7 but I don’t know where to start to fix these errors. I get sound for conf-getpin.gsm but no sound from confbridge-join.gsm.

I am getting other core sounds just fine. Help would be greatly appreciated.

   -- <PJSIP/mark-00000000> Playing 'conf-getpin.gsm' (language 'en')
    -- <PJSIP/mark-00000000> Playing 'confbridge-join.gsm' (language 'en')


[Oct 18 07:04:03] WARNING[27205][C-00000001]: app_confbridge.c:716 conf_start_record: Cannot record ConfBridge, MixMonitor app is not installed
    -- <PJSIP/mark-00000000> Playing 'confbridge-join.gsm' (language 'en')
    -- Channel CBAnn/1-00000000;2 joined 'softmix' base-bridge <edf3b63f-9b84-48e4-9f50-0a3d49b5e113>
    -- <CBAnn/1-00000000;1> Playing 'confbridge-join.gsm' (language 'en')
    -- Channel CBAnn/1-00000000;2 left 'softmix' base-bridge <edf3b63f-9b84-48e4-9f50-0a3d49b5e113>
    -- Music class  requested but no musiconhold loaded.
    -- Channel PJSIP/mark-00000000 joined 'softmix' base-bridge <edf3b63f-9b84-48e4-9f50-0a3d49b5e113>

Here is my confbridge.conf config

[default_user]
type=user

[tech_bridge]
type=bridge
max_members=10
record_conference=yes

[tech_admin]
type=user
pin=1234
marked=yes
admin=yes
music_on_hold_when_empty=yes
dsp_drop_silence=yes

[tech_member]
type=user
pin=4321
wait_marked=yes
end_marked=yes
admin=no
music_on_hold_when_empty=yes
announce_user_count=yes
dsp_drop_silence=yes

I have fixed this by rebuilding the app again. I noticed that the default menuselect had omitted core gsm files even though they were on disk. When I rebuilt the app after selecting these using checkinstall it failed as it couldn’t write the files due to a conflicting package which has installed core sound gsm files. I didn’t note the name of it. I uninstalled the package and removed the /usr/share/asterisk/sounds content and rebuilt it successfuly. Now it all works nicely.