Hi, I tested the script in a fresh installation of Ubuntu 24.04 that I downloaded yesterday and it worked fine.

It seems that some packages are broken in your system, maybe you tried to install forticlient before?

If so, you could try removing the broken packages and then restart from scratch.

sudo apt --fix-broken install

sudo apt autoremove

sudo apt remove forticlient

Also, what happens when you try to update the system?

sudo apt update

sudo apt upgrade -y