Why does vncserver fails with "Starting VNC server: Fatal server error"

Issue:
        vncserver service failed to start with below error
[orpmtn1o@Servername ~]$ vncserver

WARNING: The first attempt to start Xvnc failed, possibly because the font
catalog is not properly configured.  Attempting to determine an appropriate
font path for this system and restart Xvnc using that font path ...
Could not start Xvnc.

_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root

Xvnc TigerVNC 1.1.0 - built Sep 22 2014 07:15:59
Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
Underlying X server release 11500000, The X.Org Foundation

Initializing built-in extension Generic Event Extension
Initializing built-in extension SHAPE
Initializing built-in extension MIT-SHM
Initializing built-in extension XInputExtension
Initializing built-in extension XTEST
Initializing built-in extension BIG-REQUESTS
Initializing built-in extension SYNC
Initializing built-in extension XKEYBOARD
Initializing built-in extension XC-MISC
Initializing built-in extension XFIXES
Initializing built-in extension RENDER
Initializing built-in extension RANDR
Initializing built-in extension DAMAGE
Initializing built-in extension MIT-SCREEN-SAVER
Initializing built-in extension DOUBLE-BUFFER
Initializing built-in extension RECORD
Initializing built-in extension DPMS
Initializing built-in extension X-Resource
Initializing built-in extension XVideo
Initializing built-in extension XVideo-MotionCompensation
Initializing built-in extension VNC-EXTENSION
Initializing built-in extension GLX

Sat Feb 10 01:18:59 2018
 vncext:      VNC extension running!
 vncext:      Listening for VNC connections on all interface(s), port 5901
 vncext:      created VNC server for screen 0
[dix] Could not init font path element catalogue:/etc/X11/fontpath.d, removing from list!
[dix] Could not init font path element built-ins, removing from list!
(EE)
Fatal server error:
(EE) could not open default font 'fixed'(EE)
_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root

Xvnc TigerVNC 1.1.0 - built Sep 22 2014 07:15:59
Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
Underlying X server release 11500000, The X.Org Foundation

Initializing built-in extension Generic Event Extension
Initializing built-in extension SHAPE
Initializing built-in extension MIT-SHM
Initializing built-in extension XInputExtension
Initializing built-in extension XTEST
Initializing built-in extension BIG-REQUESTS
Initializing built-in extension SYNC
Initializing built-in extension XKEYBOARD
Initializing built-in extension XC-MISC
Initializing built-in extension XFIXES
Initializing built-in extension RENDER
Initializing built-in extension RANDR
Initializing built-in extension DAMAGE
Initializing built-in extension MIT-SCREEN-SAVER
Initializing built-in extension DOUBLE-BUFFER
Initializing built-in extension RECORD
Initializing built-in extension DPMS
Initializing built-in extension X-Resource
Initializing built-in extension XVideo
Initializing built-in extension XVideo-MotionCompensation
Initializing built-in extension VNC-EXTENSION
Initializing built-in extension GLX

Sat Feb 10 01:19:02 2018
 vncext:      VNC extension running!
 vncext:      Listening for VNC connections on all interface(s), port 5901
 vncext:      created VNC server for screen 0
[dix] Could not init font path element /usr/share/X11/fonts/misc, removing from list!
[dix] Could not init font path element built-ins, removing from list!
(EE)
Fatal server error:
(EE) could not open default font 'fixed'(EE)

Resolution:
First install the below packages on server.

tigervnc-server 
tigervnc-server-module 
libXfont 
pixman 
xterm 
xorg-x11-twm

Add the below lines under /etc/sysconfig/vncservers
VNCSERVERS="2:root"
VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -nohttpd -localhost"

Next, stop the local firewall.
[root@Servername ~]# /etc/init.d/iptables stop
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Flushing firewall rules:                                   [  OK  ]
iptables: Unloading modules:                                       [  OK  ]

Now Vncserver should work.
[orpmtn1o@Servername~]$ vncserver
New 'Servername.localhost.com:1 (orpmtn1o)' desktop is Servername.localhost.com:1
Creating default startup script /home/orpmtn1o/.vnc/xstartup
Starting applications specified in /home/orpmtn1o/.vnc/xstartup
Log file is /home/orpmtn1o/.vnc/Servername.localhost.com:1.log


Hope it helps.