Packaging failure. Fatal error, unhandled exception

I was supposed to present an architectural scene to the client but I keep getting failed packaging every time I try to do that (Windows x64).
Here are my error logs. I’d really appreciate Your help because I’m stuck with the work I’ve been preparing for months… I’m fairly new to UE4 and I don’t cover all the naming etc. so far, but maybe someone will help me understand where the problem is.