According to the announcement of Zilliqa, following the recent mainnet upgrade to v.6.4.2, the staking contract was successfully upgraded today at 08:42 UTC. All funds have been safely transferred to the new contract which has now been unpaused, i.e. staking-related transactions are now enabled. The new contract has reverted to the reward cycle of 1800 blocks, which means you can claim ZIL rewards roughly once a day. Rewards from the 2 missed cycles, blocks 838600 & 840400 have already been disbursed.