Today I installed 32-bit libraries on a 64-bit Ubuntu to get Xojo app running.
here a list of steps I made, which you may need to do also:
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 libglib2.0-0:i386 libsoup2.4-1:i386 libicu52:i386
This installs a lot of libraries and after that my apps launch!
The ldd command helps to identify which libraries an executable or library file requires.