Is there a reason that you are accessing the NAS using the server IP address rather than the NetBIOS / DNS server name?
If your router, or the MyCloud device has been rebooted recently, it may have pulled a new, different, Dynamic IP address from your router, and you will have to use that new IP address.
If the device is still showing up at that IP address, then I'm not quite sure what to tell you.
I've not really messed around or mastered Windows 10's network stuff, other than the basics, so I'm not sure what to tell you about "missing networking protocols". Do you have both IPv4, and IPv6 installed?