Unity Purchasing IOS Crash

Unity version : 5.5.0 Unity Purchasing version : 1.9.2

My app crash after unity purchasing is initialized. Stack Trace

 Crashed: com.apple.main-thread
 EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000010
  Crashed: com.apple.main-thread
     0  libobjc.A.dylib                0x1867fef70 objc_msgSend + 16
     1  StoreKit                       0x194a626b4 __NotifyObserverAboutRestoreTransactionsFinish + 48
     2  CoreFoundation                 0x187c8dc18 CFArrayApplyFunction + 68
     3  StoreKit                       0x194a6266c -[SKPaymentQueue _notifyObserversRestoreTransactionsFinished] + 136
     4  StoreKit                       0x194a61c60 -[SKPaymentQueue _finishRefreshPayments] + 64
     5  StoreKit                       0x194a62e28 __45-[SKPaymentQueue _refreshPaymentsWithPolicy:]_block_invoke_2 + 48
     6  libdispatch.dylib              0x186c3e1fc _dispatch_call_block_and_release + 24
     7  libdispatch.dylib              0x186c3e1bc _dispatch_client_callout + 16
     8  libdispatch.dylib              0x186c42d68 _dispatch_main_queue_callback_4CF + 1000
     9  CoreFoundation                 0x187d62810 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
     10 CoreFoundation                 0x187d603fc __CFRunLoopRun + 1660
     11 CoreFoundation                 0x187c8e2b8 CFRunLoopRunSpecific + 444
     12 GraphicsServices               0x189742198 GSEventRunModal + 180
     13 UIKit                          0x18dcd57fc -[UIApplication _run] + 684
     14 UIKit                          0x18dcd0534 UIApplicationMain + 208
     15 spa                          0x1000c49bc main (main.mm:32)
     16 libdispatch.dylib              0x186c715b8 (Missing)

What is problem ?