Linux Mint 20.3.
All right, I resurrected an old computer with xubuntu to test out (and it's working perfectly).
Could you run ldd ZgeBullet.so to see if the dependencies needed by this library are there?
Mine gives:
linux-vdso.so.1 (0x00007fff0dffe000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f597d87a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f597d652000) /lib64/ld-linux-x86-64.so.2 (0x00007f597da7a000)