Could not determine GDB version using command:
same for me on Ubuntu, it is fixed with "sudo apt-get install libncurses5:i386"
On the installation page, it is recommended to install libc6:i386 and lib32ncurses5
As I did not find lib32ncurses5 in the Ubuntu repository, I installed the lib32ncurses6 that was available.
How did you find out about the ":i386" suffix?