QuarkChain is going to have a mainnet upgrade so major exchanges may suspend withdrawal due to the upgrade (Apr 11, 9pm PST). After the upgrade, we will check with the exchanges and once the network is stable, they will resume withdrawal again.
Thank you for the response.
About 4 days ago, both exchanges opened up withdrawals again. I was able to buy and withdraw the coins I wanted. I think Z3r0 who I was talking with on Discord got with KuCoin staff and things got worked out.
Thank you for making us aware that the wallets may enter maintenance again for the upgrade. Upgrades are good for the overall project health, so I will not complain