Before you try @jymm's suggestion above 
, I'd suggest you try my revised suggestion, as follows.
I searched the various documentation for the NTFS filesystem driver, and finally found an answer. Sorry, I had given you the wrong options.
Open the /etc/fstab back up, and replace user_id=1000,group_id=1000 with uid=1000,gid=1000. Save the file, close the editor, and do sudo mount -a. It worked for me on my own NTFS filesystem here.
Note that if the above fails, try unmounting the NTFS filesystem first:
sudo umount /media/robert/Shared
sudo mount -a