Welcome to the forum.
Please tell us all about your Project, especially the Assets (your source Clips, both Video and Audio). The more detail, the better.
Is your Audio longer than your Video? If so, you will want to do a Dip-to-Black and add Black Video to cover your Audio stream by 100%, or a bit more. I always leave an additional 02 sec. of Black Video, past all Audio.
Can you test Exporting/Sharing to a different Preset? How does this work?
Last, can you tell us more about your systems? One of the important aspects will be the I/O sub-system, i.e. the HDD's, their size, amount of defragmented free space, their speed and how you have them allocated.
Good luck, and we'll be looking for that additional info,
Please try the patch and then let us know if you still see this issue. The patch is solving multiple crash related problems and yours could be one of them. To get to the patch, go to help->Updates, download and install it.
Restart the app and let us know...
I cannot believe it was that simple.
Thank you so much Bill!!!!
You were correct!!
Great news! Sometimes the old-guy gets one right. So very glad that it worked.