[__NSSingleEntryDictionaryI elements]: unrecognized selector sent to instance 0x2836c2820 - ios

Question

Well, I should remember you I am still a beginner in iOS development with objective c. And maybe because of this, the solution is simple but I can´t see it. I have a json who is armed in the following way :
{
"origin_addresses": [
"Test"
],
"rows": [
{
"elements": [
{
"distance": {
"text": "0.3 km",
"value": 339
},
"duration": {
"text": "1 min",
"value": 82
},
"status": "OK"
}
]
}
],
"status": "OK"
}
The app can consume the service without problems. My goal is to reach the distance attribute. Which I do as follows. I use a foreach to get through the array rows and then another foreach to get through the array elements.
for (BPCGARows *item in googleAddress.rows) {
NSLog(#"rows : %#", item);
for (BPCGAElements *element in item.elements) {
}
}
When I'm debugging the app, my first for each works without problems, but when I access the second foreach the (BPCGAElements * element in item.elements) the app crashes. Finally I can't print the item.elements in a log either. The error message is as follows:
'NSInvalidArgumentException', reason: '-[__NSSingleEntryDictionaryI
elements]: unrecognized selector sent to instance 0x281c75da0'
header BPCGADistance :
#interface BPCGADistance : MBOInspectableModel
#property (nonatomic, strong, readonly) NSString *text;
#property (nonatomic, strong, readonly) NSNumber *value;
#end
main BPCGADistance:
#interface BPCGADistance()
#property (nonatomic, strong, setter=text:) NSString *text;
#property (nonatomic, strong, setter=value:) NSNumber *value;
#end
header BPCGAElements :
#interface BPCGADistance : MBOInspectableModel
#property (nonatomic, strong, readonly) NSString *text;
#property (nonatomic, strong, readonly) NSNumber *value;
#end
main BPCGAElements:
#interface BPCGADistance()
#property (nonatomic, strong, setter=text:) NSString *text;
#property (nonatomic, strong, setter=value:) NSNumber *value;
#end
This is my NSLog(#"rows : %#", item),
I emphasize that by using the item.elements to print the crashea app on the console. ;