Assistant don't start on Win x86 builded by VS2015

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752124C2  VC service exception: Thread 00000614 is named 'QtDocInstaller' - Shift+Run/Step to pass exception to the program
          Thread 17. (ID 00000614) terminated, exit code 0
6D048110  New thread 18. (ID 000013B4) created
6D048110  New thread 19. (ID 0000081C) created
752124C2  VC service exception: Thread 000013B4 is named 'QHelpContentProvider' - Shift+Run/Step to pass exception to the program
752124C2  VC service exception: Thread 0000081C is named 'QThread' - Shift+Run/Step to pass exception to the program
          Thread 19. (ID 0000081C) terminated, exit code 0
6D048110  New thread 20. (ID 00001508) created
          Thread 18. (ID 000013B4) terminated, exit code 0
752124C2  VC service exception: Thread 00001508 is named 'fulltextsearch::clucene::QHelpS' - Shift+Run/Step to pass exception to the program
          Thread 2. (ID 000007EC) terminated, exit code 1
          Thread 15. (ID 00000140) terminated, exit code 1
          Thread 1. (ID 00001694) terminated, exit code 1
          Thread 16. (ID 00000B70) terminated, exit code 1
          Thread 14. (ID 000014F8) terminated, exit code 1
          Thread 13. (ID 00000368) terminated, exit code 1
          Thread 3. (ID 000012C0) terminated, exit code 1
          Thread 12. (ID 0000142C) terminated, exit code 1
          Thread 11. (ID 00000F44) terminated, exit code 1
          Thread 8. (ID 00000880) terminated, exit code 1
          Debug string: LEAK: 9 CachedResource
          Debug string: LEAK: 1 Frame
          Debug string: LEAK: 190 RenderObject
          Debug string: LEAK: 244 WebCoreNode
          Debug string: LEAK: 1 Page
          Debug string: QObject::~QObject: Timers cannot be stopped from another thread
          Process terminated, exit code 1