You could be missing some dependency, try launching it from the terminal and see what error will be written.
I have just checked, it seems that on Ubuntu above 18.04 you need to install: libgtk2.0-0
Simply install this and it will start.
You can install it by opening the terminal and typing:
sudo apt-get update && sudo apt-get install libgtk2.0-0
If you use other distribution simply search for the libgtk2.0 library. (Note, it may be named differently on the different distros)