App crashing with +[NSDecimalNumber gad_negativeOne]: issue?

My app was working before well, then i added `admob framework` and now its crashing . Please check the crash logs, i have tried in Google but there is no result regarding this crash. If i commented the contents inside `viewDidAppear()` then app is working(not loading app part). But if am trying to load "admob" then its crashing. Code: ``` -(void)viewDidAppear:(BOOL)animated{ if([Connectivity hasConnectivity]){ // [self loadAds]; NSTimer* myTimer = [NSTimer scheduledTimerWithTimeInterval: 15.0 target: self selector: @selector(callAfterSixtySecond:) userInfo: nil repeats: YES]; } } -(void) callAfterSixtySecond:(NSTimer*) t { if([GMMConnectivity hasConnectivity]){ [self.adBanner removeFromSuperview]; [self loadAdmob]; } } -(void)loadAdmob{ CGPoint origin; if(IS_RETINA){ if([[UIScreen mainScreen] bounds].size.height >500){ // NSLog(@"5"); origin = CGPointMake(0.0, 568- CGSizeFromGADAdSize(kGADAdSizeSmartBannerPortrait).height); }else{ // NSLog(@"4"); origin = CGPointMake(0.0, (480)- CGSizeFromGADAdSize(kGADAdSizeSmartBannerPortrait).height); } }else{ // NSLog(@"3"); origin = CGPointMake(0.0, (460)- CGSizeFromGADAdSize(kGADAdSizeSmartBannerPortrait).height); } // Use predefined GADAdSize constants to define the GADBannerView. self.adBanner = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait origin:origin] ; // Note: Edit SampleConstants.h to provide a definition for kSampleAdUnitID // before compiling. self.adBanner.adUnitID = MY_BANNER_UNIT_ID; self.adBanner.delegate = self; [self.adBanner setRootViewController:self]; [self.view addSubview:self.adBanner]; self.adBanner.center = CGPointMake(self.view.center.x, self.adBanner.center.y); [self.adBanner loadRequest:[self createRequest]]; [self.view addSubview:adBanner_]; } ```