Reset Vegas Pro 17 to default. Now every video created in this version no longer play. All media loads correctly and no third party VSTs are in use. Have uninstalled and re-installed several times, but results stay the same. Everything was working fine until I upgraded to Pro 23. That literally started a cascade of issues with PC functions and created strange USB behavior. Have uninstalled Pro 23 and have no plans to try again any time soon. (wasted money, time)
System is Win 10, 64 bit, Ryzen 7, 32gb memory.