Final Cut Pro X 10.4. on High Sierra keeps crashing when sharing (exporting)

Final Cut Pro X 10.4. on High Sierra keeps crashing everytime i try to share my project. I recently upgrated my mac to High Sierra and its been doing this every since....i've upgraded my final cut pro from 10.1 to 10.4 and now all i can do is just edit on there and can't share or export my project into a video file... need help with this