aws:Client.RequestExpired: Request has expired. Timestamp date is 2015-02-04T16:09:08Z.

If you get an error like this when you do a "Check Amazon AWS Keys" or an "Advanced Search", please update your server date. If you don't have access to the server, ask your hosting provider to do this.

After the server date has been updated, to check if the problem is solved, simply do a "Check Amazon AWS Keys".