VNC Server Fails to Start Desktop Environment – “Session cleanly exited too early”

I’m having trouble launching the desktop environment for noVNC. After setting up and trying to run the VNC server, I receive the following error root@localhost:~# vncserver :2 New Xtigervnc server 'localhost:2 (root)' on port 5902 for display:2. Use xtigervncviewer -SecurityTypes VncAuth -passwd /tmp/tigervnc.okGWtL/passwd :2 to connect to the VNC server. =================== tail /root/.vnc/localhost:2.log =================== Session startup via '/root/.vnc/xstartup' cleanly exited too early (< 3 seconds)! Maybe try something simple first, e.g., tigervncserver -xstartup /usr/bin/xterm The X session cleanly exited! Killing Xtigervnc process ID 16190... success! root@localhost:~# Only the default tigervncserver works. I’ve tried different desktop environments, including XFCE, GNOME, and others, but nothing seems to work. The session always exits too early.