I have same issue as of Saturday 7/26 - error code 3. However, I can connect to my remote Slingbox 350 just fine with my laptop or iPad. I can also use the WD Live to play Netflix or other streaming services. The issue just appeared yesterday on the WD Live.
I use the WD Live SlingPlayer everyday to watch a remove slingbox and this has been working with no issues for the last 6 months. My remote Slingbox is on Comcast network and the WD Live is on Cablevision.
Anyone else having issues with same error code?