downloadTask error when building demo examples for iOS

Hi there,

When I try to build iOS apps from demo examples, I always get the same error. It says "No viable conversion from returned value of type ‘unique_ptrjuce::BackgroundDownloadTask’ to function return type ‘unique_ptrURL::DownloadTask’ " at the line 656 in file.

Could anybody help me how to fix this error, please? I’m using Projucer6.0.4 and Xcode 8.2.1

Thank you