WATT0

1. thingy OFF. 2. edit, add, remove, choose. 3. thingy ON. 4. export auido ONLY. 5. make sure you only have the vid track WITH its audio (hanen't tested with multiple image tracks) import the audio from step 4. 6. export video.

I got the same, I added a vid extrat audio no export "network error" recover audio and delete the extraed track I was able to export, now... edit the vid in full multi audio tracks (voice and music, ETC) just like you want it then export audio ONLY, errase the audio tracks and recover audio, mute vid track, add the auidio you exported so you have just 2 tracks video (muted) and the audio. Hope it make sense