If you cannot access the My Cloud using it’s network name that may indicate some sort of DNS issue with your local network router, or issue with SMB 1.0 being disabled on the computer, or the Windows computer is configured for Public rather than Private network. If using Microsoft Windows 10 it’s possible Microsoft disabled SMB 1.0 during a recent update. The following two posts have some suggestions on getting the My Cloud to work properly with Windows 10.
Also try a different web browser as a troubleshooting step. Also try disabling any security software or Windows “host” file manager as a troubleshooting step. It is possible one or both of those kinds of programs can interfere with the Dashboard. And lastly make sure no add-on apps are running as some can interfere with the Dashboard scripting.