Is this game still supported.
I tried to fire up the 2.0 disc in the WiiU and it only gives and error about failing to connect to a server.
I’d try 3.0 if it is actually playable 
Nope. Disney shut down all the Disney Infinity servers. They don’t support it all anymore.
I think you can still play locally on the 3.0 version but it is severely limited. No marketplace for shared maps and definitely no online play.
My boys still enjoy playing. No online play.