VNC plugin for Remmina not found after upgrade

Occasionally, I am no longer to connect to any VNC host with Remmina : using the existing connections leads to the following error message : « VNC pluging is not installed ».

This is addressed by reinstalling libvncserver, then reinstalling the VNC plugin

sudo apt-get purge libvncserver0
sudo apt-get install remmina-plugin-vnc