Rush stops rendering randomly
Premiere Rush version 1.5.50
Process:
1. Launch Premiere Rush
2. Do some cut and paste, rotate, blah blah.
3. Finished editing, move to 'Share'
4. Select 'Youtube' only, and choose 'Export'
5. Rush starts to render the video... for a while. It says about 8~14min remaining...
6. and it suddenly stops, at any point.

7. I can cancel the rendering and restart, then it does not start rendering this time.

8. I cannot even shut down Rush after this point. I can only force-shutdown via task manager, by killing the process on 'details' tab.

(it doesn't even kill the process sometimes, saying "Access Denied" instead.)
