I ran into a bug on arch linux, after an update nekobox won't start. I couldn't get back to the required version, so I had to unpack it from AppImage and use it. But here is such an error, if you have the opportunity to do up to the new version.

/usr/lib/nekobox/nekobox: error while loading shared libraries: libprotobuf.so.28.2.0: cannot open shared object file: No such file or directory