Updating the engine broke my project?

Hey, I’ve been working on a game for several months and recently decided to update from 4.9 to 4.11, due to previous updates being fine but now it seems that I can not package my project anymore.

I had packaged a game just before the update, as I opened it in ue4.11 and tried it, I got an error, I opened the project up in 4.9 hoping it would still work and alas I got the same error, Is there anybody that can shed light on this for me ?
I have attached the Output log.[link text][1]

EDIT :: It packaged in win32 but not in 64.
[1]: 75483-packageerroroutputlog.txt (19.1 KB)

I hade a similar problem, so I needed to update the Visual Studio 2015 and install everything there, common tools and etc.

Try to do that repairing or modifying the visual studio 2015

Good luck!

Thanks for the suggestion, I got it to package in Win32, never had to do that before I don’t think though.