Hello everyone.

I am running the latest version of Kali on my Notebook. Everything works well, but the only thing I can't fix is my running session.
Kali is unable to push me back to the session that has already opened.
Unfortunately I don't have enough understanding of Linux distributed GUIs to solve this on my own.

When I close my Notebook or lock it and log back a couple of minutes later, I only see my cursor and a black screen.
My logs are saying:

Code:
Xsession: X session started for helios at Di 21. Jan 16:50:35 CET 2020
dbus-update-activation-environment: setting DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting XAUTHORITY=/home/helios/.Xauthority
localuser:helios being added to access control list
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: setting USER=helios
dbus-update-activation-environment: setting XDG_SESSION_TYPE=x11
dbus-update-activation-environment: setting HOME=/home/helios
dbus-update-activation-environment: setting DESKTOP_SESSION=lightdm-xsession
dbus-update-activation-environment: setting XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
dbus-update-activation-environment: setting DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
dbus-update-activation-environment: setting QT_QPA_PLATFORMTHEME=gtk2
dbus-update-activation-environment: setting LOGNAME=helios
dbus-update-activation-environment: setting XDG_SESSION_CLASS=user
dbus-update-activation-environment: setting PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
dbus-update-activation-environment: setting GDM_LANG=de_DE.utf8
dbus-update-activation-environment: setting _JAVA_OPTIONS=-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true
dbus-update-activation-environment: setting XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
dbus-update-activation-environment: setting XDG_RUNTIME_DIR=/run/user/1000
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting LANG=de_DE.UTF-8
dbus-update-activation-environment: setting XDG_SESSION_DESKTOP=lightdm-xsession
dbus-update-activation-environment: setting XAUTHORITY=/home/helios/.Xauthority
dbus-update-activation-environment: setting XDG_GREETER_DATA_DIR=/var/lib/lightdm/data/helios
dbus-update-activation-environment: setting SHELL=/bin/bash
dbus-update-activation-environment: setting GDMSESSION=lightdm-xsession
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: setting GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
dbus-update-activation-environment: setting PWD=/home/helios
dbus-update-activation-environment: setting XDG_DATA_DIRS=/usr/share/xfce4:/usr/local/share/:/usr/share/
/usr/bin/x-session-manager: X server already running on display :0
xfce4-session-Message: 16:50:35.442: SSH authentication agent is already running
gpg-agent[1339]: WARNUNG: "--write-env-file" ist eine veraltete Option - sie hat keine Wirkung.
gpg-agent: Ein gpg-agent l?uft bereits - ein weiterer wird nicht gestartet

(xfce4-session:1276): xfce4-session-WARNING **: 16:50:35.447: gpg-agent returned no PID in the variables

(wrapper-2.0:1730): Gtk-WARNING **: 16:50:37.350: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner GtkToggleButton)

(wrapper-2.0:1747): GLib-GIO-CRITICAL **: 16:50:37.426: g_file_new_for_path: assertion 'path != NULL' failed

(wrapper-2.0:1747): GLib-GIO-CRITICAL **: 16:50:37.426: g_file_monitor_file: assertion 'G_IS_FILE (file)' failed

(wrapper-2.0:1747): GLib-GObject-WARNING **: 16:50:37.426: invalid (NULL) pointer instance

(wrapper-2.0:1747): GLib-GObject-CRITICAL **: 16:50:37.426: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(wrapper-2.0:1747): Gtk-WARNING **: 16:50:37.426: Attempting to add a widget with type GtkToggleButton to a container of type XfcePanelPlugin, but the widget is already inside a container of type XfcePanelPlugin, please remove the widget from its existing container first.

(wrapper-2.0:1747): Gtk-WARNING **: 16:50:37.454: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner GtkToggleButton)

(wrapper-2.0:1749): Gtk-WARNING **: 16:50:37.616: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner PowerManagerButton)

(wrapper-2.0:1745): Gtk-WARNING **: 16:50:37.622: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner PulseaudioButton)
[Parent 1766, Gecko_IOThread] WARNING: pipe error (151): Die Verbindung wurde vom Kommunikationspartner zur?ckgesetzt: file /build/firefox-esr-tpvy6K/firefox-esr-68.2.0esr/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 358

(wrapper-2.0:1730): Gdk-CRITICAL **: 17:13:33.710: Window 0x564a4f3bf280 has not been made visible in GdkSeatGrabPrepareFunc