what happen to this error guys?

[danielzang]

• Application Specific Information: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSURL setInputStream:]: unrecognized selector sent to instance 0x1d42f5b00'
  0	CoreFoundation	0x000000018387b164 ___exceptionPreprocess + 124
  1	libobjc.A.dylib	0x0000000182ac4528 _objc_exception_throw + 56
  2	CoreFoundation	0x0000000183888628 ___methodDescriptionForSelector + 0
  3	CoreFoundation	0x0000000183880b10 _forwarding + 1380
  4	CoreFoundation	0x0000000183765ccc __CF_forwarding_prep_0 + 92
  5	zhidao	0x0000000103e81fb0 -[SRProxyConnect _failWithError:] (SRProxyConnect.m:141)
  6	zhidao	0x0000000103e83134 -[SRProxyConnect stream:handleEvent:] (SRProxyConnect.m:0)
  7	CoreFoundation	0x00000001837b32d0 __signalEventSync + 212
  8	CoreFoundation	0x00000001837b31dc __cfstream_shared_signalEventSync + 460
  9	CoreFoundation	0x000000018382377c _CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
  10	CoreFoundation	0x00000001838236fc ___CFRunLoopDoSource0 + 88
  11	CoreFoundation	0x0000000183822f84 ___CFRunLoopDoSources0 + 204
  12	CoreFoundation	0x0000000183820b5c ___CFRunLoopRun + 1048
  13	CoreFoundation	0x0000000183740c58 _CFRunLoopRunSpecific + 436
  14	Foundation	0x0000000184175594 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
  15	zhidao	0x0000000103e83dc8 -[SRRunLoopThread main] (SRRunLoopThread.m:70)
  16	Foundation	0x00000001842770f4 _NSThreadstart__ + 996
  17	libsystem_pthread.dylib	0x00000001834a42b4 __pthread_body + 308
  18	libsystem_pthread.dylib	0x00000001834a4180 __pthread_start + 312
  19	libsystem_pthread.dylib	0x00000001834a2b74 _thread_start + 4