Calendar Crashes While Opening - NSPersistentStoreCoordinator has no persistent stores or NSInternalInconsistencyException The calendar crashes after 1s while opening. I already opened the temp dir open $TMPDIR..deleted the cache C folder, restarted the computer and deleted the trash. This was not successful. Even after the upgrade to sierra the calendar is still broken.

I created a guest user account, where I'm able to open the calendar. But I cannot open it on my main (admin) account.

I tried to open the calendar after I had booted from safe mode. I also tried to open the calendar in safe mode, which was also not possible. The error is the same.

main error

This NSPersistentStoreCoordinator has no persistent stores (unknown).  It cannot perform a save operation.


full error

I trimmed the error a bit otherwise I couldn't post it there.

Process:               Calendar [27732]
Path:                  /Applications/Calendar.app/Contents/MacOS/Calendar
Identifier:            com.apple.iCal
Version:               9.0 (2155)
Build Info:            iCal-2155000000000000~2
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Calendar [27732]
User ID:               501

Date/Time:             2016-10-10 13:27:38.511 +0200
OS Version:            Mac OS X 10.12 (16A323)
Report Version:        12
Anonymous UUID:        DD7A2269-DAE5-C038-6F53-34D6AAA3EF21

Sleep/Wake UUID:       160FAB72-D6A8-4065-90C4-627329158025

Time Awake Since Boot: 250000 seconds
Time Since Wake:       50000 seconds

System Integrity Protection: enabled

Crashed Thread:        3  Dispatch queue: com.apple.NSXPCConnection.m-user.com.apple.CalendarAgent.proxy

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00003562149bbec0
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]


===========                     =======  ======= 
TOTAL                            583.7M      829 

Model: MacBookAir6,2, BootROM MBA61.0099.B22, 2 processors, Intel Core i5, 1,4 GHz, 8 GB, SMC 2.13f15
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.21.171.10.1a16)
Bluetooth: Version 5.0.0f18, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD SD0256F, 251 GB
USB Device: USB 3.0 Bus
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Air, Apple Inc., 23.6
I had the same issue after updating to Sierra.  Saw in some other forums that it was linked to gmail calendar accounts.  Assuming you have a gmail calendar account linked, try disabling the gmail account from Settings and then opening calendar.  Once open you can re-enable the gmail calendar and it works fine (at least for me it does).

Not a solution to the problem, but a temporary fix to allow you to use calendar until Apple figures this out.