Amazon Web Service S3 timed out
Whenever the Amazon AWS Mobile SDK displays an unclear warning in the console, turn on verbose logging to debug:
(Swift 4) AWSDDLog.sharedInstance.logLevel = .verbose
(Swift 3)AWSLogger.default().logLevel = .verbose
(Swift 2) AWSLogger.defaultLogger().logLevel = .Verbose
…to reveal more information about what S3 buckets, regions, endpoints etc. are being used.