Can't play sound file..? file probably missing from disk/repository

[RazMouze]

/lua/autorun/main.lua <- That is the one trying to call the soundfile.
/sound/sound.wav
/materials/icon.png

Error:
Failed to load sound "sound\sound.wav", file probably missing from disk/repository

[MysteryPancake]

Try playing "sound.wav" instead of "sound/sound.wav"

[editline]5th June 2017[/editline]

Or try moving "sound/sound.wav" into "sound/sound/sound.wav". I think when you play the sound it searches the sound folder by default without you telling it to