I got answer from Cryptopia:
XZC is currently in maintenance. New Zerocoin Protocol Exploit found. Wallet offline until a protocol fix is developed.
Your depositS will process when the maintenance has been completed and the wallet is back online again.
Unfortunately there is no ETA on when the XZC wallet will be back online again.
You can keep an eye on the wallet here :
https://www.cryptopia.co.nz/CoinInfo/?coin=XZC
Sorry for the inconvenience this has caused.

Please feel free to contact us if you have any further questions.
I will close this ticket.

Thanks

fairlady

The Cryptopia Team