As mentioned by @lveci, the error alone refers to the missing dependency, the fastest solution tested with Debian based distributions like Ubuntu/Kubuntu is installing the libgfortran3 packge
sudo apt install libgfortran3
this is all you need and always does the job for me if I set up a new system or instance. However, libgfortran3 is often used as dependency by other packages, therefore it may be installed if your system is “older” which means you already have many packages installed…but it is not obligatory…