TypeError: Value is undefined ...

[ael]

I am running linphone desktop under debian testing:

$ dpkg -s linphone-desktop
Package: linphone-desktop
[..snip..]
Maintainer: Debian VoIP Team <pkg-voip-maintainers at lists.alioth.debian.org>
Architecture: amd64
Source: linphone-desktop (4.4.10-2)
Version: 4.4.10-2+b1
.....

For a while now, I have not been able to add new contacts. I can enter
the new name, but clicking on the (+) icons to enter the sip address,
etc does nothing other than produce the type error:

(From the log)

14:32:16:665][0x557f8a81efc0][Warning]qrc:/ui/modules/Common/Form/ListForm.js:70: TypeError: Value is undefined and could not be converted to an object

Linphone itself reports:
Desktop 4.4.10 - Qt5.15.7
Core 5.1.65

In passing, I have also recently found a probably unrelated bug: after
accepting an incoming call successfully, the next incoming call from the
same caller is not detected by linphone unless it is restarted. This when
using sipgate.co.uk as the registry. I haven't explored this bug
properly or collected logs so far, nor am I sure whether a "second"
call from another caller is also rejected.

But for now, lets's concentrate on the inability to add a new contact...

ael