No Audio Playback

I was toward the end of editing a 2 hour video and the audio stopped playing. I can't hear anything. My speakers are working, other apps can play audio but nothing from DaVinci Resolve 15 beta 2. Pleas help.
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=73969
hooprod wrote:I was toward the end of editing a 2 hour video and the audio stopped playing. I can't hear anything. My speakers are working, other apps can play audio but nothing from DaVinci Resolve 15 beta 2. Pleas help.
Dwaine Maggart wrote:Did your system update to Windows version 1803? Are you using clips with AC3 audio?