I have the same issue. When I want to start a new project a crash report pops up. I had no problem with Rush till the latest update (version 1.5.12). To solve the problem I deleted this version and tried to reinstall the previous version 1.5.8, but it automatically updates to 1.5.12. Tried to open a old Rush project, but the same problem appears.
I use Rush on my desktop (Window 10, Intel Core i7, NVIDIA Geforce GTX 1050). All are updated.