I believe I'm having the same error, specifically it happens when I push anything on the title screen. I'm running Windows 7 64bit
Error
lib/erogodic.lua:0: Error executing script: script/special/introduction.lua:0: attempt to index global 'ui' (a nil value)
Traceback
[C]: in function 'error'
lib/erogodic.lua: in function 'next'
scene/game/cutscene.lua: in function '_processNodesWhileReady'
scene/game/cutscene.lua: in function 'update'
scene/game/game.lua: in function 'update'
main.lua: in function 'update'
main.lua: in function <main.lua:0>
[C]: in function 'xpcall'