# App crashes at \[SBDGroupChannel getMember:\] **URL:** \ **Category:** iOS\ **Tags:** group-channel, chatsdk\ **Created:** [July 11, 2022, 4:51am UTC](https://community.sendbird.com/t/app-crashes-at-sbdgroupchannel-getmember/5026 "2022-07-11T04:51:31Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Sunil\_Chauhan](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/sunil_chauhan/32/2039_2.png) [@Sunil\_Chauhan](https://community.sendbird.com/u/Sunil_Chauhan)\ **Post date:** [July 11, 2022, 4:51am UTC](https://community.sendbird.com/t/app-crashes-at-sbdgroupchannel-getmember/5026/1 "2022-07-11T04:51:31Z")
I have noticed some crashes in Sendbird SDK. The stack trace is like this: **Crashed: com.apple.main-thread** **EXC\_BAD\_ACCESS KERN\_INVALID\_ADDRESS 0x00005a6fe71ce550** ```auto Crashed: com.apple.main-thread 0 libobjc.A.dylib 0x1f28 objc_msgSend + 8 1 CoreFoundation 0x17218 -[__NSDictionaryM objectForKeyedSubscript:] + 184 2 SendBirdSDK 0xa874c -[SBDGroupChannel getMember:] + 2095 (SBDGroupChannel.m:2095) 3 SendBirdSDK 0xf9410 -[SBDBaseMessage sender] + 611 (SBDBaseMessage.m:611) 4 App 0x260ba0 sender.get + 28 (ChatMessage.swift:28) 5 App 0xf7ff0 isFromCurrentSender + 253 (ChatDatasource.swift:253) 6 MessageKit 0x35a04 messageBottomLabelAlignment + 240 (MessageSizeCalculator.swift:240) 7 MessageKit 0x32c98 configure + 4328385688 (MessagesCollectionViewLayoutAttributes.swift:4328385688) 8 MessageKit 0x41704 configure + 74 (TextMessageSizeCalculator.swift:74) 9 MessageKit 0x2b850 layoutAttributesForElements + 124 (MessagesCollectionViewFlowLayout.swift:124) 10 MessageKit 0x2bb8c layoutAttributesForElements + 4328356748 (:4328356748) 11 UIKitCore 0x19cde4 __45-[UICollectionViewData validateLayoutInRect:]_block_invoke + 148 12 UIKitCore 0x176df4 -[UICollectionViewData validateLayoutInRect:] + 1232 13 UIKitCore 0x179a20 -[UICollectionView layoutSubviews] + 220 14 UIKitCore 0x18bfb4 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2592 15 QuartzCore 0x40cd0 CA::Layer::layout_if_needed(CA::Transaction*) + 532 16 QuartzCore 0x33134 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 136 17 QuartzCore 0x47a7c CA::Context::commit_transaction(CA::Transaction*, double, double*) + 452 18 QuartzCore 0x50970 CA::Transaction::commit() + 704 19 QuartzCore 0x3288c CA::Transaction::flush_as_runloop_observer(bool) + 88 20 CoreFoundation 0x410c4 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 21 CoreFoundation 0x10080 __CFRunLoopDoObservers + 592 22 CoreFoundation 0xb13c __CFRunLoopRun + 1052 23 CoreFoundation 0x1ebc8 CFRunLoopRunSpecific + 600 24 GraphicsServices 0x1374 GSEventRunModal + 164 25 UIKitCore 0x514648 -[UIApplication _run] + 1100 26 UIKitCore 0x295d90 UIApplicationMain + 364 27 App 0x6168 main + 18 (WebViewController.swift:18) 28 ??? 0x100a15ce4 (Missing) ``` I am using the `SendBirdSDK (3.0.238)` & `SendBirdSyncManager (1.1.41)`. Can you please look into this?