Trying to burn dvd, error pops up on scene. Error synchronizing project, This tempory directory isn't accessible.

I'd try a different dvd software burning program or try reinstalling the program. I use about 4 different dvd burning programs when I burn lots of dvd's on my PC or my laptop. Sometimes it's the program, sometimes it's the actual type of disc or sometimes it's the files. Sometimes all three problems pop up until I use another burner. Or if all else fails, turn off your computer and reboot. Sometimes that fixes the problem.