This is still a new coin (very new) under pretty major development.  Block 7000 was the penultimate hurdle, Sanctuaries (Masternodes) in December is the final.  Despite testing, block 7000 broke some things, there are still a few glitches.  So the wallet gets frozen at times like this to prevent this errors from causing harm to users of the exchanges.  This is only the second wallet freeze, I'd wager there might be one more in late December.  But the Dev is very active, and trying to do a lot, so this is the consequence at times.

Hang on for another day or two, then you should be able to transfer coins at C-Cex again (if not sooner).  You can still trade on the site you just cannot move coins to or from the exchange yet.