This NSPersistentStoreCoordinator has no persistent stores (I/O error). It cannot perform a save operation.

This NSPersistentStoreCoordinator has no persistent stores (I/O error). It cannot perform a save operation.
(null)
((
    0 CoreFoundation 0x000000022cbf1294  + 252
    1 libobjc.A.dylib 0x000000022bdcb9f8 objc_exception_throw + 56
    2 CoreData 0x000000022f7b0798  + 0
    3 CoreData 0x000000022f7b0868  + 208
    4 CoreData 0x000000022f7b0af8  + 608
    5 CoreData 0x000000022f646d14  + 240
    6 CoreData 0x000000022f64799c  + 844
    7 CoreData 0x000000022f6479c8  + 888
    8 CoreData 0x000000022f64881c  + 1592
    9 XMPPFramework 0x00000001056bb920 -[XMPPCoreDataStorage save] + 304
    10 XMPPFramework 0x00000001056bbe98 __37-[XMPPCoreDataStorage scheduleBlock:]_block_invoke + 76
    11 libdispatch.dylib 0x000000022c630a38  + 24
    12 libdispatch.dylib 0x000000022c6317d4  + 16
    13 libdispatch.dylib 0x000000022c60cdec  + 548
    14 libdispatch.dylib 0x000000022c60d92c  + 408
    15 libdispatch.dylib 0x000000022c615e08  + 584
    16 libsystem_pthread.dylib 0x000000022c811114 _pthread_wqthread + 304
    17 libsystem_pthread.dylib 0x000000022c813cd4 start_wqthread + 4
)