I can make this consistently crash when exporting Artboards 2, 4, or 5. If I turn off the Grids layer it exports correctly. I found that converting a Repeat Grid a making it a normal Group of objects fixes the issue but I have no idea how I did that in the first place.

Expanding the repeats seems to solve the crash.

For example Artboards 1 and 3 grids were created by a repeat but somehow it got converted back to a group of objects.