I've been working on the Lock Box from the Projects area. I'm a new user and I'm learning Tinkercad for a course at university. I've got to the end of lesson 1 and two things happen. 1) I can't seem to move forward to lesson 2
2) The one time I was able to get through to lesson 2 the work I had done in lesson 1 is inaccessible.
What's going on?