崩溃与“未找到符号:_OBJC_CLASS_$_NSMutableURLRequest”

I have installed my app from Xcode 5.1.1 in debug mode on iPad 3 with iOS 7.1.1, as show below in crash log. In day of installing app was working fine. I was not using my iPad for 2 days and today it just crashes on Splash screen, at first second. Restart of iOS does not helped.I have installed my app from Xcode 5.1.1 in deb