org.kde.bluedevilsendfile.desktop in Lubuntu does not launch

Selecting the "BlueDevil Send File" through the Application Menu or the "Applications" place in pcmanfm-qt gives no result: no window or dialogue opens.
A device has already been paired using BlueDevil Wizard.
Running the command found in the desktop file ("bluedevil-sendfile -k %u") in a terminal *does* open the "Bluetooth Send File Wizard" window with the following terminal output:

lubuntu@lubuntu:~$ bluedevil-sendfile -k %u
Icon theme "elementary" not found.
bluedevil.sendfile: Device "%u"
bluedevil.sendfile: Files ()
bluedevil.sendfile: Manager initialized

Steps to reproduce:
1. Boot Lubuntu 21.10 in a live session
2. Click on the Application Menu
3. Select "Internet > BlueDevil Wizard"
4. Pair a device
5. Open the Application Menu
6. Select "Internet > BlueDevil Send File"

Result:
Nothing happens

Expected result:
Bluetooth Send File Wizard opens

Ubuntu Release:
Lubuntu 21.10 _Impish Indri_ - Beta amd64 (20210926)
Hardware:
Lenovo Yoga 300-11IBR (Intel N3060 @1.60GHz, 2GiB, N3060 Integrated Graphics Controller)

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: bluedevil 4:5.22.5-0ubuntu1
ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13
Uname: Linux 5.13.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu69
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.465
CurrentDesktop: LXQt
Date: Mon Sep 27 15:38:07 2021
LiveMediaBuild: Lubuntu 21.10 "Impish Indri" - Beta amd64 (20210926)
SourcePackage: bluedevil
UpgradeStatus: No upgrade log present (probably fresh install)