Crash in build unity 5.6 need help

Hi we getting this crashing report for our project can you help us understand what may be causing this?

crash 1:

========== OUTPUTING STACK TRACE ==================

0x0000000140E5B333 (Skirmish) physx:xsBroadPhaseContextSap::batchUpdate
0x0000000140E5B908 (Skirmish) physx::BroadPhaseBatchUpdateWorkTask::runInternal
0x0000000140E59C4B (Skirmish) physx:xsBroadPhaseContextSap::updatePPU
0x0000000140DA3DB2 (Skirmish) physx::Cm::Task::run
0x000000014026827C (Skirmish) mkvparser::BlockEntry::`scalar deleting destructor'
0x00000001405232B3 (Skirmish) JobQueue::Exec
0x00000001405234B7 (Skirmish) JobQueue:rocessJobs
0x00000001405235CE (Skirmish) JobQueue::WorkLoop
0x0000000140814ECC (Skirmish) Thread::RunThreadWrapper
0x0000000076F759BD (kernel32) BaseThreadInitThunk
0x00000000770AA2E1 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

**** Crash! ****

crash 2:

========== OUTPUTING STACK TRACE ==================

0x000000014092B37F (Skirmish) physx:xsBroadPhaseContextSap::batchUpdate
0x000000014092B908 (Skirmish) physx::BroadPhaseBatchUpdateWorkTask::runInternal
0x0000000140929C4B (Skirmish) physx:xsBroadPhaseContextSap::updatePPU
0x0000000140873DB2 (Skirmish) physx::Cm::Task::run
0x000000013FD3827C (Skirmish) mkvparser::BlockEntry::`scalar deleting destructor'
0x000000013FFF32B3 (Skirmish) JobQueue::Exec
0x000000013FFF34B7 (Skirmish) JobQueue:rocessJobs
0x000000013FFF35CE (Skirmish) JobQueue::WorkLoop
0x00000001402E4ECC (Skirmish) Thread::RunThreadWrapper
0x0000000076F759BD (kernel32) BaseThreadInitThunk
0x00000000770AA2E1 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

**** Crash! ****

crash 3:

========== OUTPUTING STACK TRACE ==================

0x000000014080B37F (Skirmish) physx:xsBroadPhaseContextSap::batchUpdate
0x000000014080B908 (Skirmish) physx::BroadPhaseBatchUpdateWorkTask::runInternal
0x0000000140809C4B (Skirmish) physx:xsBroadPhaseContextSap::updatePPU
0x0000000140753DB2 (Skirmish) physx::Cm::Task::run
0x000000013FC1827C (Skirmish) mkvparser::BlockEntry::`scalar deleting destructor'
0x000000013FED32B3 (Skirmish) JobQueue::Exec
0x000000013FED3B2C (Skirmish) JobQueue::ExecuteOneJob
0x000000013FBFEA3D (Skirmish) CompletionTask:rocessAllPhysicsTasks
0x000000013FC30010 (Skirmish) PhysicsManager::FixedUpdate
0x000000013FC304BF (Skirmish) ProduceHelper<PhysicsManager,0>:roduce
0x000000013FF4205E (Skirmish) PlayerLoop
0x000000013F92C3CB (Skirmish) ScreenManagerWin::OnWindowRegainedFocus
0x000000013F92C5BA (Skirmish) TitleBarTimerUpdateCallback
0x000000013F940FB8 (Skirmish) PlayerWinMain
0x00000001405F3B8C (Skirmish) wcsncmp
0x0000000076F759BD (kernel32) BaseThreadInitThunk
0x00000000770AA2E1 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

**** Crash! ****

please we need help