Unable to install .deb via gdebi

Hello

Recently I can't install .deb packages by double click. Gdebi comes up and as soon as I click 'install' the window disappears and it does not install.

Mate 20.04.03, updates up-to-date (Kernel 5.13.0.27)

Thanks for the help.

You can install deb packages via the command line.
gdebi [package.deb]

You can also use synaptic to uninstall programs. Synpatic is a great apt tool, I suggest you look at it.
sudo apt-get install synaptic