In my home/, the folders Desktop, Downloads, Public, and Templates cannot be accessed anymore. For some reasons, those XDG user directories turned into symbolic links.
ticjo@komputilo:~$ ls -l
total 52K
drwxr-xr-x 5 ticjo ticjo 4.0K Feb 9 2022 AndroidStudioProjects/
drwxr-xr-x 3 ticjo ticjo 4.0K Feb 9 2022 Audio_Books/
drwxr-xr-x 2 ticjo ticjo 4.0K Aug 11 16:17 Backup_launch/
lrwxrwxrwx 1 ticjo ticjo 19 Aug 30 08:16 Desktop -> /home/ticjo/Desktop
drwxr-xr-x 5 ticjo ticjo 4.0K Aug 11 13:52 Documents/
lrwxrwxrwx 1 ticjo ticjo 21 Aug 30 11:57 Downloads -> /home/ticjo/Downloads
drwxrwxr-x 5 ticjo ticjo 4.0K Aug 8 10:13 Logiciels/
drwxrwxr-x 6 ticjo ticjo 4.0K Aug 7 15:58 mount/
drwxr-xr-x 7 ticjo ticjo 4.0K Aug 3 16:50 Music/
drwxr-xr-x 26 ticjo ticjo 4.0K Aug 3 16:53 Pictures/
lrwxrwxrwx 1 ticjo ticjo 18 Aug 30 08:16 Public -> /home/ticjo/Public
drwxrwxr-x 3 ticjo ticjo 4.0K Aug 7 16:06 python_envs/
drwx------ 11 ticjo ticjo 4.0K Aug 9 11:34 snap/
drwxrwxr-x 2 ticjo ticjo 4.0K Aug 8 10:24 'System Volume Information'/
lrwxrwxrwx 1 ticjo ticjo 21 Aug 30 08:16 Templates -> /home/ticjo/Templates
drwxr-xr-x 5 ticjo ticjo 4.0K Aug 3 16:55 Videos/
drwxr-xr-x 3 ticjo ticjo 4.0K Aug 3 14:04 VirtualBox_VMs/
ticjo@komputilo:~$
When I try to cd to one of these folders I get the following error.
ticjo@komputilo:~$ cd /home/ticjo/Desktop
bash: cd: /home/ticjo/Desktop: Too many levels of symbolic links
ticjo@komputilo:~$
Note also that the folders of my home/ appear on my desktop.

A solution to resolve the problem temporarily is:
- Delete the symbolic links using
rm Desktop Downloads Public Templates, - Recreate the folders using
mkdir Desktop Downloads Public Templates, - Edit the file
~/.config/user-dirs.dirsfrom
XDG_DESKTOP_DIR="$HOME/"
XDG_DOWNLOAD_DIR="$HOME/"
XDG_TEMPLATES_DIR="$HOME/"
XDG_PUBLICSHARE_DIR="$HOME/"
XDG_DOCUMENTS_DIR="$HOME/Documents"
XDG_MUSIC_DIR="$HOME/Music"
XDG_PICTURES_DIR="$HOME/Pictures"
XDG_VIDEOS_DIR="$HOME/Videos"
to
XDG_DESKTOP_DIR="$HOME/Desktop"
XDG_DOWNLOAD_DIR="$HOME/Downloads"
XDG_TEMPLATES_DIR="$HOME/Templates"
XDG_PUBLICSHARE_DIR="$HOME/Public"
XDG_DOCUMENTS_DIR="$HOME/Documents"
XDG_MUSIC_DIR="$HOME/Music"
XDG_PICTURES_DIR="$HOME/Pictures"
XDG_VIDEOS_DIR="$HOME/Videos"
However, after some times, all the empty XDG user directories are turned into symbolic links again.
I'm using Ubuntu 23.04.