Final Cut Pro 10.4 on High Sierra crashes every-time i share

Need Help .... after updating to High Sierra and since then every-time i try to share or export project it automatically crashes.....i tried to create new library's and erase render files and it still does the same things . at first i had FCPX 10.1 and it worked fine but once i upgraded my mac to High Sierra my FCPX 10.1 wouldn't work anymore so i had to upgrade to FCPX 10.4 in order for it start working......then i went and edited my whole video and as soon as i tried to share it it crashed...... so then i opened it up and tried to share it again and it crashed once again..... so then i tried to test it out in a brand new library on a different hard drive with just a small video clip and as soon as i tried to share it crashed again.....IF ANYBODY CAN HELP ME WITH THIS IT WILL BE MUCH NEEDED....THANKS