ccminer can't connect to stratum :
[2017-10-11 19:48:03] Stratum authentication failed
[2017-10-11 19:48:03] ...retry after 30 seconds
And if I let the miner run, I have this message every 30 seconds and no hashrate

Does your worker name match with the one what you created in the account settings?
Did you use the worker's pass what you set here?
https://xzc.suprnova.cc/index.php?page=account&action=workersI know it is basic but once I used my account's password instead of the worker's and spent ~10 minutes to figure out what's wrong.

So just a hint...