I’m also getting this same “error 32512” but not from an update.
This is when trying to install “flatpak” from the pre-installed “Software Manager” application on a
x86_64 machine running Linux Cinnamon 20 v4.6.7
Also, I get the same “error 32512” when I download “nomachine_8.14.2_1_amd64.deb” from the NoMachine website and try installing it.
However, I did manage to successfully install the latest version and get it working using terminal. See as below.
It may be worth uninstalling your version and then reinstalling using the correct file for your architecture / Linux flavour .
Hope this observation is of help to people.
sudo apt update
sudo apt upgrade
wget https://download.nomachine.com/download/8.10/Linux/nomachine_8.14.2_1_amd64.deb
sudo dpkg -i nomachine_8.14.2_1_amd64.deb