i've made alot of changes to my map and im now trying to update it, but it gets stuck at 11% preparing changes and wont progress any further. ive tried canceling and restarting multiple times but it always instantly goes to 11% and stops.
Try deleting the SubmissionCache folder as displayed here
you may need to manually add to the address for the /Data folder, as it is a hidden folder and won't show in windows unless you have your settings customized to do so.
After the SubmissionCache is deleted, you should be able to try updating again and 9 times out of 10 that will fix the issue