VNC server not working after upgrade on RPi3 and RPi4B

[fbriceno97]

After upgrading to the latest version of the VNC Server and viewer:

Preparing to unpack .../5-realvnc-vnc-server_6.5.0.41730_armhf.deb ...
Unpacking realvnc-vnc-server (6.5.0.41730) over (6.4.1.40826) ...
Preparing to unpack .../6-realvnc-vnc-viewer_6.19.715.41730_armhf.deb ...
Unpacking realvnc-vnc-viewer (6.19.715.41730) over (6.19.325.40889) ...

I am not able to use the server, and i get this message:

VNC(R) Server 6.5.0 (r41730) ARMv6 (Jul 30 2019 11:26:43)
Copyright (C) 2002-2019 RealVNC Ltd.
RealVNC and VNC are trademarks of RealVNC Ltd and are protected by trademark
registrations and/or pending trademark applications in the European Union,
United States of America and other jurisdictions.
Protected by UK patent 2481870; US patent 8760366; EU patent 2652951.
See https://www.realvnc.com for information on VNC.
For third party acknowledgements see:
https://www.realvnc.com/docs/6/foss.html
OS: Raspbian GNU/Linux 10, Linux 4.19.58, armv7l

On some distributions (in particular Red Hat), you may get a better experience
by running vncserver-virtual in conjunction with the system Xorg server, rather
than the old version built-in to Xvnc. More desktop environments and
applications will likely be compatible. For more information on this alternative
implementation, please see: https://www.realvnc.com/doclink/kb-546

Running applications in /etc/vnc/xstartup

The virtual session failed to start. Session log:

XvncSession start time: 2019-08-13T22:28:09.206Z

pulseaudio not installed
Starting Xvnc
Waiting for Xvnc...
VNC(R) Server 6.5.0 (r41730) ARMv6 (Jul 30 2019 11:36:39)
Copyright (C) 2002-2019 RealVNC Ltd.
RealVNC and VNC are trademarks of RealVNC Ltd and are protected by trademark
registrations and/or pending trademark applications in the European Union,
United States of America and other jurisdictions.
Protected by UK patent 2481870; US patent 8760366; EU patent 2652951.
See https://www.realvnc.com for information on VNC.
For third party acknowledgements see:
https://www.realvnc.com/docs/6/foss.html
OS: Raspbian GNU/Linux 10, Linux 4.19.58, armv7l
<13> 2019-08-13T22:28:09.263Z raspberrypi Xvnc[875]: ServerManager: Server start ed
Underlying X server release 609000, The X.Org Foundation

error opening security policy file /usr/X11R6/lib/X11/xserver/SecurityPolicy
Could not init font path element /usr/X11R6/lib/X11/fonts/misc/, removing from l ist!
Could not init font path element /usr/X11R6/lib/X11/fonts/TTF/, removing from li st!
Could not init font path element /usr/X11R6/lib/X11/fonts/Type1/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/CID/, removing from li st!
Could not init font path element /usr/X11R6/lib/X11/fonts/75dpi/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/100dpi/, removing from

I have a topic about this on the forums:
https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=248731

There is a user that tried a fresh install, and got the same problem.

Thanks