Ubuntu 18.04 xrdp RDP Error

If you are like me, trying to connect to your Ubuntu desktop remotely using Windows RDP client and stuck with the error message:
authentication is required to create a color managed device
[Image: xrdp_authentication_popup.png]

Simple Solution

Click the CANCEL button and it will take you to the desktop!

Note, this is a temporary solution, you will be stopped by this pop-up message every time you reconnect.

Permanent Solution

Edit the file, /usr/share/polkit-1/actions/org.freedesktop.color.policy
vi /usr/share/polkit-1/actions/org.freedesktop.color.policy

Go to the defaults section and modify <allow_inactive>no</allow_inactive> to <allow_inactive>yes</allow_inactive>