Cloud app not working

You will need to provide more information for people here to assist you. Like what app were you using that is having trouble accessing the WD My Cloud? Were you connecting locally or remotely?

Currently no problems using the My Cloud Desktop app on a Windows 7 PC, My Cloud app for Android, WD Photos app for Android to access a remote WD My Cloud.

Note that as previously indicated both in the stickied thread at the top of the forum an in several other threads here (like this one), the WD2Go.com website is currently undergoing an upgrade and is unavailable. The remote apps should continue to operate while this upgrade is taking place.