This morning I have updated my Xcode 9 beta 1 to Xcode 9 beta 6. I'm working with ARKit and my application works fine on beta 1 but now, when I run my app I got this error:
//
//dyld: Symbol not found: _OBJC_CLASS_$_ARConfiguration
//Referenced from: /var/containers/Bundle/Application/5B74AF4C-011C-45B0-8BAD-DEF3DA7C0DFA/testARKit.app/testARKit
//Expected in: /System/Library/Frameworks/ARKit.framework/ARKit in /var/containers/Bundle/Application/5B74AF4C-011C-45B0-8BAD-DEF3DA7C0DFA/testARKit.app/testARKit
//
It's a SIGABRT on my thread 1
0 __abort_with_payload
-> 0x102ba1774 <+8>: b.lo 0x102ba178c <+32>
5 _dydl_start
-> 0x102b751e0 <+68>: mov x16, x0
Let me know how to fix this bug.
Clean your project: shift + option + cmd + k, then remove your derived data and rebuild project.