The LUA library is used to add scripting support to Wireshark.
If this library isn’t already installed or available as a package for your platform, you can get it at https://www.lua.org/download.html.
We provide copies of the official packages at https://anonsvn.wireshark.org/wireshark-win64-libs/trunk/packages/ and https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/.