When packaging some of my projects I have had issues and crashing due to specific items in the project.
Sometimes they are items that have been deleted from the content browser, but still remain in the content folder(for the specific project) on the computer.
And other times they are just items it doesn’t like (a blueprint, a material, can be anything), I found 4.6 didn’t like some transparent materials quite a bit.
It will usually say what the item is in the output for the packaging.
So when packaging view the output, and if it crashes, read through the part were it says anything about failing, and if it identifies a file in the content folder delete that item and try again (it might be several items, it should list them all)
(Maybe do this with a duplicate of the project or back it up first just in case)