Hello, Niniann!
Assuming that you have strict caching checks turned on, it might be an issue where a residual file slipped to the bootstrap's file catalog. It's a weird bug, but as long as you don't have any extra files. it should be fine.
If not, please check Event Viewer. It may provide some info about the crash. It is found under Errors -> Application Error. Look for any error logs that mention the bootstrap.