The panel encountered a problem while loading "IndicatorAppletCompleteFactory::IndicatorAppletComplete" error when using xrdp and mate

I am running an Ubuntu 20.04 image from AWS:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.2 LTS
Release:        20.04
Codename:       focal

I have installed xrdp and mate on this instance:

# Install xrdp
sudo apt-get install xrdp=0.9.12-1 -y

# Install mate
sudo apt-get install mate-desktop-environment=1.24.0+1 -y

# Configure xrdp to use mate
echo "mate-session" > $HOME/.xsession

when I log in, I see this window:

enter image description here

how can I fix this error?

Asked By: Foo

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I fixed this by installing mate-desktop-environment-extras:

$ sudo apt-get install mate-desktop-environment-extras=1.24.0+1 -y
Answered By: Foo

Reset the desktop environment, it worked for me.

dconf reset -f /org/gnome/
Answered By: Mahaz
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