mail keeps crashing please advise

onsaldaharo wrote:

Exception Type: EXC_CRASH (SIGABRT)

Exception Codes: 0x0000000000000000, 0x0000000000000000

Exception Note: EXC_CORPSE_NOTIFY

Application Specific Information:

*** Terminating app due to exception while holding database lock 'NSInvalidArgumentException', reason: '*** -[__NSSetM addObject:]: object cannot be nil', userInfo: (null)

abort() called

You do not say what exact Mac /model /year /size /retina /touchbar is this

or

what exact macOS you are currently running?

Mail Keeps Crashing on macOS High Sierra, How-To Fix - AppleToolBox

Mail crashes - Apple Community - Apple Support Communities

Safe Boot from the HD, (holding Shift key down at bootup), does the problem occur in Safe Mode?

That leaves about 1 option... Reinstall the OS. :(

Did this happen after some update?