Have you used this instruction?
https://github.com/seth586/guides/blob/master/FreeNAS/bitcoin/freenas_2_bitcoin.md

Did you forget to specify the parameters in the bitcoin conf?


Have you tried using the bitcoin-cli getaddressinfo [address] command directly?

As far as I understand, you are using the web page for search? If yes: look what JsonRpc returns. You can do this in the browser in developer mode on the Network tab.