appInit.m

#import "AppDelegate.h"
#import "ADVTheme.h"
#import "StackMob.h"

#define PUBLIC_KEY @"YOUR_PUBLIC_KEY"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    [ADVThemeManager customizeAppAppearance];
    
    self.client = [[SMClient alloc] initWithAPIVersion:@"0" publicKey:PUBLIC_KEY];
    self.coreDataStore = [self.client coreDataStoreWithManagedObjectModel:self.managedObjectModel];
    
    return YES;
}

- (NSManagedObjectModel *)managedObjectModel
{
    if (_managedObjectModel != nil) {
        return _managedObjectModel;
    }
    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"ApartmentModel" withExtension:@"momd"];
    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
    return _managedObjectModel;
}

i try to running the app on my device the open and show me the login screen when i press login they start loding and crash Cocoa error 513