Currently there is an issue with withdrawals of ZCL on Cryptopia. This is a problem on their end, and we are attempting to contact them to resolve the issue. Please be patient, and we appreciate your support through this! We hope to have withdrawals fixed as soon as possible. Seeing as this is a weekend, there may be no resolution until Monday or later.
From the Cryptopia main page:
UPDATE 1: It appears some users are still able to complete withdrawals.
UPDATE 2: It seems the reason that some transactions will go through is that occasionally Cryptopia will connect to 1 node for a limited amount of time.
UPDATE 3: Cryptopia page has changed, showing some new info about and update. We will investigate if needed.