Mixdown has no audio, but plays if imported into Cubase

I can’t figure out what settings have changed since last time, but I have exported many audio mixdowns with no problem until now. All of my mixdowns (wav, mp3) do not play any audio in my audio player (vlc). However, if I import the soundless exports into cubase, they actually play with sound. I am probably missing something obvious, but I can’t figure it out. Looking for any insight into why this is happening, thanks.