Last upstream release was in 2017. Seems Unlikely that they can help with a lua port.
Many compile errors with lua 5.3, however Qosmic builds OK with lua 5.1 with a one line change. src/lua/frame.cpp // 98 lua_tointegerx(L, 1, &isnum) - 1; --> lua_tointeger(L, isnum) - 1;
