Yeah, the problem is the 32-bit variant of libgtk2.0-0 aka libgtk2.0-0:i386 missing by default. For now it’d be best to just include it as a dependency.
sudo apt install libgtk2.0-0:i386
for one’s terminal novice needs. Also libgtk2.0-0:i386 is itself dependant on libatk1.0-0:i386 libgail-common:i386 libgail18:i386 (not relevant for you, akirassasin)