Debian: Freshly installed on Proxmox v7. Build the Guacamole Server From Source: command line the following: sudo apt install build-essential libcairo2-dev libjpeg62-turbo-dev libpng-dev libtool-bin libossp-uuid-dev libvncserver-dev freerdp2-dev libssh2-1-dev libtelnet-dev libwebsockets-dev libpulse-dev libvorbis-dev libwebp-dev libssl-dev libpango1.0-dev libswscale-dev libavcodec-dev libavutil-dev libavformat-dev Download the latest build wget https://apache.org/dyn/closer.lua/guacamole/1.3.0/source/guacamole-server-1.3.0.tar.gz tar -xvf guacamole-server-1.3.0.tar.gz