EXC_BAD_ACCESS (SIGABRT) from Unity::Material::CreateMaterial

Hi. now i'm developing ios apps on unity and build it on unity cloud service as well because of windows. today I got the following error from crash log of my test iphone and I've been struggling with it but never found solution. If you know any solution please let me know. Unity Version: 5.1.1 / Test ios version: 9.0.2

 Exception Type:  EXC_BAD_ACCESS (SIGABRT)
 Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
 Triggered by Thread:  0

 Filtered syslog:
 None found

 Thread 0 name:  Dispatch queue: com.apple.main-thread
 Thread 0 Crashed:
 0   libsystem_kernel.dylib            0x35cb8d24 0x35ca4000 + 85284
 1   libsystem_pthread.dylib           0x35d58b5b 0x35d55000 + 15195
 2   libsystem_c.dylib                 0x35c50f51 0x35c06000 + 307025
 3   gameapps                         0x019b7bd8 _mono_walk_stack
 4   gameapps                         0x019a735c _mono_sigsegv_signal_handler
 5   libsystem_platform.dylib          0x35d5485f 0x35d50000 + 18527
 6   gameapps                         0x01215238 Unity::Material::CreateMaterial(Shader&, int, bool) (Material.cpp:481)
 7   gameapps                         0x014efa18 UI::GetDefaultUIMaterial() (Canvas.cpp:36)
 8   gameapps                         0x014f88f4 Canvas_CUSTOM_GetDefaultCanvasMaterial() (UICanvasBindings.gen.cpp:250)
 9   gameapps                         0x008afe58 _m_1a3e (UnityEngine.dll.s:128302)
 10  gameapps                         0x006c4ddc _m_20a (UnityEngine.UI.dll.s:11170)
 11  gameapps                         0x006c4e30 _m_20b (UnityEngine.UI.dll.s:11181)
 12  gameapps                         0x006c4f04 _m_20d (UnityEngine.UI.dll.s:11214)
 13  gameapps                         0x006c5344 m_UnityEngine_UI_Graphic_UpdateMaterial (UnityEngine.UI.dll.s:11371)
 14  gameapps                         0x006c52c4 _m_212 (UnityEngine.UI.dll.s:11350)
 15  gameapps                         0x006b9920 _m_16f (UnityEngine.UI.dll.s:6536)
 16  gameapps                         0x008aff70 _m_1a40 (UnityEngine.dll.s:128328)
 17  gameapps                         0x00e19fa8 _m_4511 (mscorlib.dll.s:354231)
 18  gameapps                         0x019a6c04 _mono_jit_runtime_invoke
 19  gameapps                         0x01a490c0 _mono_runtime_invoke
 20  gameapps                         0x011d2c18 ScriptingInvocation::Invoke(MonoException**, bool) (ScriptingInvocation.cpp:181)
 21  gameapps                         0x014f4ce8 UI::CanvasManager::WillRenderCanvases() (vector:1468)
 22  gameapps                         0x0117c2f8 PlayerLoop(bool, bool, IHookEvent*) (Player.cpp:1718)
 23  gameapps                         0x00f54fb4 UnityPlayerLoopImpl(bool) (LibEntryPoint.mm:249)
 24  gameapps                                                  0x0009c304 _UnityRepaint (UnityAppController+Rendering.mm:250)
 25  gameapps                         0x000acf30 -[UnityAppController(ViewHandling) showGameUI] (UnityAppController+ViewHandling.mm:169)
 26  gameapps                                                  0x000a987c -[UnityAppController startUnity:]     (UnityAppController.mm:113)
 27  Foundation                        0x248eae59 0x2481a000 + 855641
 28  CoreFoundation                    0x23ae4fb7 0x23a2c000 + 757687
 29  CoreFoundation                    0x23ae4be9 0x23a2c000 + 756713
 30  CoreFoundation                    0x23ae2a35 0x23a2c000 + 748085
 31  CoreFoundation                    0x23a351e9 0x23a2c000 + 37353
 32  CoreFoundation                    0x23a34fdd 0x23a2c000 + 36829
 33  GraphicsServices                  0x2cc99af9 0x2cc90000 + 39673
 34  UIKit                             0x27c9a17d 0x27c21000 + 495997
 35  gameapps                         0x00091e04 _main (main.mm:32)
 36  libdyld.dylib                     0x35be9873 0x35be7000 + 10355