JS ERROR: TypeError: this.window_container is null

Thanks for the bug report. I have removed most of the log messages because they are already covered by bug 1968383. So now this bug is only about:

  JS ERROR: TypeError: this.window_container is null

Looks similar to https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4324 but that was fixed in GNOME 41.

Status changed to 'Confirmed' because the bug affects multiple users.

Now tracking in https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5512

In progress: https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2738

This bug was fixed in the package gnome-shell - 44.1-1ubuntu1

---------------
gnome-shell (44.1-1ubuntu1) mantic; urgency=medium

  * Merge with Debian (LP: #2020277, LP: #1968383, LP: #1968390, LP: #2016007)
  * Remaining changes:
    - Add some Recommends:
      + ubuntu-session (| gnome-session) to have the ubuntu session available
      + ubuntu-wallpapers
      + xserver-xorg-legacy
      + yaru-theme-gnome-shell for the default ubuntu theming
    - Move some Recommends to Suggests:
      + chrome-gnome-shell
      + gnome-backgrounds
    - Update debian/gbp.conf with Ubuntu settings
    - debian/ubuntu-session-mods/ubuntu.json: Use Yaru's gnome-shell icons
    - debian/patches: Do not hang & crash if fingerprint service fails to start
      (LP: #1962566)
    - ubuntu/desktop_detect.patch:
      + add caching for desktop detection to avoid querying the current
        desktop env variable as iterate through the list each time. For the
        time of the Shell process, we can expect this env variable to stay
        stable.
    - ubuntu/lightdm-user-switching.patch:
      + Allow user switching when using LightDM.
    - ubuntu/lock_on_suspend.patch
      + Respect Ubuntu's lock-on-suspend setting.
    - ubuntu/background_login.patch
      + Change default background color as we modified the default GDM color
        for our ubuntu session.
    - ubuntu/gdm_alternatives.patch
      + Add support for GDM3 theme alternatives
    - main-show-an-error-message-on-gnome-shell-crash.patch,
      global-make-possible-to-set-debug-flags-dynamically.patch,
      main-increase-the-granularity-of-backtraces-in-SHELL_DEBU.patch,
      main-add-backtrace-crashes-all-and-backtrace-all.patch,
      sessionMode-add-support-for-debugFlags-parameter.patch:
      + Improve debug JS tracing for crash reports
    - ubuntu/smarter_alt_tab.patch:
      + quick alt-tab (without showing up the switcher) switch only between
        the last window of the last 2 applications to be focused instead of
        raising all windows of those apps.
    - magnifier-Show-cursor-when-magnifier-is-enabled-and-scale.patch:
      + Show monitor scaled cursor when magnifier is enabled
    - ubuntu/search-call-XUbuntuCancel-method-on-providers-when-no-dat.patch:
      + stop searches when requested from UI
    - magnifier-Show-cursor-when-magnifier-is-enabled-and-scale.patch
    - u/search-call-XUbuntuCancel-method-on-providers-when-no-dat.patch
    - ubuntu/resolve_alternate_theme_path.patch
    - ubuntu/secure_mode_extension.patch
    - ubuntu/keep-ubuntu-logo-bright-lp1867133-v1.patch
    - ubuntu/configure_login_screen.patch
    - ubuntu/layout-Make-starting-in-the-overview-optional.patch:
      + Makes dock replace overview easier
    - ubuntu/layout-Try-to-allocate-before-getting-size-of-tracke.patch:
      + Ensure windows don't get maximized under the panels / dock
    - debian/patches: Compute system background color from theme (LP: #1965727)
    - ubuntu/configure-login-screen.patch: Use bg color for initial system bg
      (LP: #1965727)
    - debian/patches: Ensure St.Entry's `selected-color` CSS property is
      honored (LP: #1878998)
    - ubuntu/support-loading-Y...

For simplicity, we are going to use bug 1968383 for tracking this bugfix for Ubuntu 23.04.