qreator doesn't show any QR code, but many errors on stderr

Reproduce the problem:

1. Start qreator in the terminal (I used xfce4-terminal on xUbuntu 22.04)
2. Select URL for the new QR code to generate
3. Enter a URL, like "example.com"

Nothing happens in the GUI.
It is not possible to save anything or set anything.

In the shell, many errors are shown (see attached log of `qreator &> qreator_log.txt`)

In fact: the program is unusable in that state.

Regards

Andreas

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: qreator 16.06.1-7
ProcVersionSignature: Ubuntu 5.15.0-50.56-generic 5.15.60
Uname: Linux 5.15.0-50-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 24 00:08:30 2022
PackageArchitecture: all
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: qreator
UpgradeStatus: Upgraded to jammy on 2022-05-02 (174 days ago)