About a week ago, I tried to open Mail and it will flash quickly and then a screen pops up that Mail has quit unexpectedly. The screen has a series of code and a button on the bottom right to "Reopen" which is supposed to restore the app, but it doesn't work.
Safe mode may help to troubleshoot.
How to use safe mode on your Mac - Apple Support
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Mail won't open and gives an error message that mail has quit unexpectedly
