.desktop file is not executed

when I find and start a command from main Menu via "Activities", the programme starts as expected. But when I try to start this programme in the Appfinder, nothing happens.

This is the content of the desktop file:
[Desktop Entry]
Name=home tree - my Apps
Exec=pcmanfm /home/userName/.local/share/applications
Comment=alacarte
Terminal=false
Icon=/home/userName/Dokumente/Tools/Icons/network-wireless.png
Type=Application

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xfce4-appfinder 4.16.1-1
ProcVersionSignature: Ubuntu 5.15.0-43.46-generic 5.15.39
Uname: Linux 5.15.0-43-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 9 08:27:16 2022
InstallationDate: Installed on 2022-04-22 (108 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: xfce4-appfinder
UpgradeStatus: No upgrade log present (probably fresh install)