LÖVE

Menu.lua:24 attempt to index field 'even'(a nil value)

What does this error mean? It happens when i click on the "Quit" button I made. Im still trying to the to grips with what the error messages mean on this!

It means that in line 24 of the file "Menu.lua" you are trying to use something called "even", but this variable does not exist.
In this case you did a typo and wrote love.even instead of love.event.