iOS objC upload file to firebase not happening - ios

Question

I need to upload a file to firebase, firebase account is set, iOS project is connecting...
The file exists, and I check for file size before sending...
when I try the upload the process starts, but I get the error:
Error Domain=FIRStorageErrorDomain Code=-13000 "An unknown error occurred, please check the server response
This is the path for the file:
/var/mobile/Containers/Data/PluginKitPlugin/A14B0460-06E7-4EC0-80CE-9C27B5B70BC2/Documents/img.JPG
My doubt is if I have "riversRef" property correctly set?... What is missing?
- (void)uploadFileTest:(NSURL*)url {
// reference
FIRStorage * storage = [FIRStorage storage];
// Create a root reference
FIRStorageReference *storageRef = [storage reference];
FIRStorageReference *riversRef = [storageRef child:#"images/rios.jpg"]; // is this correct?
FIRStorageMetadata *metadata = [[FIRStorageMetadata alloc] init];
metadata.contentType = #"image/jpeg";
NSLog(#"storageRef: %#", storageRef);
NSLog(#"url path: %#", [url path]);
NSLog(#"metadata : %#", metadata);
//object size?
if ([[NSFileManager defaultManager] fileExistsAtPath:[url path]]){
long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:url.absoluteString error:nil][NSFileSize] longLongValue];
NSLog(#"sik: %lld", fileSize);
}else{
NSLog(#"nanais");
}
NSURL *curaul = [NSURL fileURLWithPath:[url path]];
// Upload file and metadata to the object 'images/rios.jpg'
FIRStorageUploadTask *uploadTask = [riversRef putFile:curaul metadata:metadata];
// Listen for state changes, errors, and completion of the upload.
[uploadTask observeStatus:FIRStorageTaskStatusResume handler:^(FIRStorageTaskSnapshot *snapshot) {
// Upload resumed, also fires when the upload starts
NSLog(#"upload started");
}];
[uploadTask observeStatus:FIRStorageTaskStatusPause handler:^(FIRStorageTaskSnapshot *snapshot) {
// Upload paused
NSLog(#"paused");
}];
[uploadTask observeStatus:FIRStorageTaskStatusProgress handler:^(FIRStorageTaskSnapshot *snapshot) {
// Upload reported progress
double percentComplete = 100.0 * (snapshot.progress.completedUnitCount) / (snapshot.progress.totalUnitCount);
NSLog(#"percentComplete :: %f", percentComplete);
}];
[uploadTask observeStatus:FIRStorageTaskStatusSuccess handler:^(FIRStorageTaskSnapshot *snapshot) {
// Upload completed successfully
NSLog(#"successfully");
}];
// Errors only occur in the "Failure" case
[uploadTask observeStatus:FIRStorageTaskStatusFailure handler:^(FIRStorageTaskSnapshot *snapshot) {
NSLog(#"errore :: %#", snapshot.error.description);
if (snapshot.error != nil) {
switch (snapshot.error.code) {
case FIRStorageErrorCodeObjectNotFound:
// File doesn't exist
break;
case FIRStorageErrorCodeUnauthorized:
// User doesn't have permission to access file
break;
case FIRStorageErrorCodeCancelled:
// User canceled the upload
break;
/* ... */
case FIRStorageErrorCodeUnknown:
// Unknown error occurred, inspect the server response
break;
}
}
}];
}
Is the response to unknown error?
How to fix upload?, thanks