The c-cex support has been contacted with troubleshooting steps.

The linux wallet is working and is in sync on multiple other servers.
Based on the error shown in the ccex environment, the initial goal in troubleshooting is to rule out any transitory resource limits or disk corruption in that particular environment.
Given it is the weekend it may be Monday that the ccex staff is able to reconnect and troubleshoot the issue.

With regards.