Try checking the log file for the crash in ‘project-folder’/Saved/Logs/‘project-name’.log in the Unreal base folder where projects are stored.
It’ll open in a Notepad or similar app, and do a search for “Error”, “Failure”, or another bug type term.
The log file can also be uploaded to Unreal via the Bug Submission Form. Tracking what it is before doing so could help solving the problem more quickly.