[gregor@gregor-laptop ~]$ LANG=en xfce4-panel-profiles save /tmp/a

(xfce4-panel-profiles.py:16901): Gtk-WARNING **: 20:52:54.790: Locale not supported by C library.
	Using the fallback 'C' locale.
GLib.Error('Key file contains key “Exec” which has a value that cannot be interpreted.', 'g-key-file-error-quark', 5)

# Export via UI
[gregor@gregor-laptop ~]$ LANG=en xfce4-panel-profiles  

(xfce4-panel-profiles.py:17015): Gtk-WARNING **: 20:53:22.661: Locale not supported by C library.
	Using the fallback 'C' locale.
/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py:132: DeprecationWarning: Gtk.Widget.override_background_color is deprecated
  self.xfce_header.override_background_color(0, base_color[1])
/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py:134: DeprecationWarning: Gtk.Widget.override_color is deprecated
  self.xfce_header.override_color(0, fg_color[1])
/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py:99: PyGTKDeprecationWarning: Using positional arguments with the GObject constructor has been deprecated. Please specify keyword(s) for "title, parent, action, buttons" or use a class specific constructor. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
  button, Gtk.ResponseType.ACCEPT))
/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py:99: PyGTKDeprecationWarning: The "buttons" argument must be a Gtk.ButtonsType enum value. Please use the "add_buttons" method for adding buttons. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
  button, Gtk.ResponseType.ACCEPT))
Traceback (most recent call last):
  File "/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py", line 233, in on_export_clicked
    self.save_configuration(filename, False)
  File "/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/xfce4-panel-profiles.py", line 208, in save_configuration
    PanelConfig.from_xfconf(self.xfconf).to_file(filename)
  File "/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/panelconfig.py", line 66, in from_xfconf
    pc.find_desktops()
  File "/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/panelconfig.py", line 145, in find_desktops
    if self.check_desktop(desktop_path):
  File "/usr/share/xfce4-panel-profiles/xfce4-panel-profiles/panelconfig.py", line 126, in check_desktop
    exec_str = keyfile.get_string("Desktop Entry", "Exec")
GLib.Error: g-key-file-error-quark: Key file contains key “Exec” which has a value that cannot be interpreted. (5)