The scheduled maintenance has been completed.

Scheduled maintenance is currently in progress. We will provide updates as necessary.

We will be undergoing scheduled maintenance during this time.

Users will be unable to withdraw SNX while maintenance is underway. Withdrawals will fail.
Users will not be able to deposit, we won't be able to see this from our side.

See: https://blog.synthetix.io/the-mimosa-release/

This is "scheduled maintenance" happening by the Synthetix team, external to Kraken.