I've put my transaction ID into that blockexplorer, it says the amount of confirmations etc. Outputs for total amount of ETN and such. I'm not sure what everything on that page means, but it looks like the whole transaction has completed a while ago. It's more that the ETN wallet itself can't update, it just keeps saying it failed to update. I won't transfer any more coins from cryptopia before I see my balance there.
PS How do you check whether or not the transaction has completed? On the BTC blockchain I could see when it had completed but here I'm not sure.
see next to "Block:", if there's a number, it's confirmed. if it's N/A then it's pending. You have nothing to worry about, the ETN arrived, just the app isn't refreshing that's all. Keep them on Cryptopia for now, or send them to a paper wallet.