VNC black screen

Hello,

I got a black screen when connected to VNC server. Can anyone help? Here is the log:

Code:Xvnc TigerVNC 1.9.0 - built Apr 23 2020 14:52:39
Copyright (C) 1999-2018 TigerVNC Team and many others (see README.rst)
See http://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12003000, The X.Org Foundation

Sat Oct 10 04:19:41 2020
vncext: VNC extension running!
vncext: Listening for VNC connections on all interface(s), port 5901
vncext: created VNC server for screen 0
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Internal error: Could not resolve keysym XF86MonBrightnessCycle
> Internal error: Could not resolve keysym XF86RotationLockToggle
Errors from xkbcomp are not fatal to the X server

Sat Oct 10 04:19:46 2020
Connections: accepted: [::1]::52728
SConnection: Client needs protocol version 3.8
SConnection: Client requests security type VeNCrypt(19)
SVeNCrypt: Client requests security type TLSVnc (258)

Sat Oct 10 04:19:52 2020
VNCSConnST: Server default pixel format depth 24 (32bpp) little-endian rgb888
VNCSConnST: Client pixel format depth 24 (32bpp) little-endian rgb888