diff --git a/RNCalendarEvents.m b/RNCalendarEvents.m
index 2783f30..90a7a03 100644
--- a/RNCalendarEvents.m
+++ b/RNCalendarEvents.m
@@ -30,10 +30,19 @@ @implementation RNCalendarEvents
 - (NSString *)hexStringFromColor:(UIColor *)color {
     const CGFloat *components = CGColorGetComponents(color.CGColor);
 
-    CGFloat r = components[0];
-    CGFloat g = components[1];
-    CGFloat b = components[2];
-
+    CGFloat r;
+    CGFloat g;
+    CGFloat b;
+    if(components && sizeof(components) >= 3){
+        r = components[0];
+        g = components[1];
+        b = components[2];
+    }else{
+        r = 1;
+        g = 1;
+        b = 1;
+    }
+    
     return [NSString stringWithFormat:@"#%02lX%02lX%02lX",
             lroundf(r * 255),
             lroundf(g * 255),
@@ -494,7 +503,7 @@ - (NSDictionary *)serializeCalendarEvent:(EKEvent *)event
 
     if (event.calendar) {
         [formedCalendarEvent setValue:@{
-                                        @"id": event.calendar.calendarIdentifier,
+                                        @"id": event.calendar.calendarIdentifier?event.calendar.calendarIdentifier: @"tempCalendar",
                                         @"title": event.calendar.title ? event.calendar.title : @"",
                                         @"source": event.calendar.source && event.calendar.source.title ? event.calendar.source.title : @"",
                                         @"allowsModifications": @(event.calendar.allowsContentModifications),
@@ -655,7 +664,7 @@ - (NSDictionary *)serializeCalendarEvent:(EKEvent *)event
 
     [formedCalendarEvent setValue:[self availabilityStringMatchingConstant:event.availability] forKey:_availability];
     
-    if (event.structuredLocation) {
+    if (event.structuredLocation && event.structuredLocation.title && event.structuredLocation.radius) {
         NSMutableDictionary *structuredLocation = [[NSMutableDictionary alloc] initWithCapacity:3];
         [structuredLocation addEntriesFromDictionary: @{
                                                         @"title": event.structuredLocation.title,