Upload to Gallery immediately crashes my game..

sssamanthataylor​  The lastcrash files are generally not useful to anyone outside of EA.  Testing is more helpful here.  So please create a very simple build: maybe a few walls to form a box plus a couple of chairs or tables.  Try uploading that to the Gallery and see what happens.  You can take it down again afterwards if it does in fact upload properly.

If this doesn't help, repeat the test (with a new build) but with your Mods folder removed.