I seem to be an issue with Unity crashing during this lesson. I havent had any issue until today. I think it is related to the creating a terrain prefab but it has done it a couple of times when after I had the prefab deleted. Anyone else had this issue that they traced back to something. I did fill out the crash log for Unity but wanted to see any info here. I don’t want to have to restart this project. By the way I am using unity 2017.3
Mine has been ok. I’m not sure how to help, to be honest…
Are you using source control - perhaps reverting to an earlier version of your project could help?