iOS 11.2.2 cant download files from Dropbox in last (3.4.0) ObjectiveDropboxOfficial SDK

I try download simple zip file from Dropbox to devices.
But see the error:

```
DropboxClientError[{
NSError = "Error Domain=NSCocoaErrorDomain Code=513 \"\U201cCFNetworkDownload_aKHDTE.tmp\U201d couldn\U2019t be moved because you don\U2019t have permission to access \U201ctmp\U201d.\" UserInfo={NSSourceFilePathErrorKey=/var/mobile/Library/Caches/com.apple.nsurlsessiond/Downloads//CFNetworkDownload_aKHDTE.tmp, NSUserStringVariant=(\n Move\n), NSDestinationFilePath=/private/var/mobile/Containers/Data/Application/802158E7-6B2A-483F-BBFB-861D0F8EDE3A/tmp/D6B99CC4-6F71-4B32-9129-779784AFB60E, NSFilePath=/var/mobile/Library/Caches/com.apple.nsurlsessiond/Downloads//CFNetworkDownload_aKHDTE.tmp, NSUnderlyingError=0x109756820 {Error Domain=NSPOSIXErrorDomain Code=1 \"Operation not permitted\"}}";
}];

```
My code:

```
id currentTask = [userClient.filesRoutes downloadUrl:backupMetadata.pathLower overwrite:YES destination:outputURL];
[[(DBDownloadUrlTask*)currentTask setResponseBlock:^(DBFILESFileMetadata *result, DBFILESDownloadError *routeError, DBRequestError *networkError, NSURL *destination) { .. }];
```

For previous iOS version framework work fine. Checked in 10.3.3.