I would need some extra information to replicate the issue. Do you have another terminal installed (such as xterm) where you can run qterminal from it? If so, try running "qterminal" there and paste the logs here.
Also try running "sudo qterminal", as running the app as root won't use Kali's changes and might not be affected. That way I can easier find where the issue is.

If you don't have another terminal installed, you can change to a tty terminal with ctrl + alt + F4, login, and install xfce's terminal for example
sudo apt install xfce4-terminal
You can then get back to the desktop view with ctrl + alt F7