Install dependencies
sudo apt-get install libxrandr-dev libx11-dev libxfixes-dev libssl-dev libpam0g-dev -y
$ sudo nano /etc/xrdp/xrdp.ini
change max bpp from 32 to 24
max_bpp=24
References:
https://nileshgr.com/2015/02/09/xrdp-linux-mint-17-1-ubuntu-14-04