Issue using COTH

Hello,
I have been using COTH for couple of weeks now. At first, everything was going smoothly, but now, everytime I am trying to use it, I am getting the following message:

An error has occured for target S0883A-S0883B
COTH job has failed

Please report to zhanglabs web forum.
For Developer:When error resolved delete user email addresss file and rerun TACOS
I have submitted to job several time, and evrytime I am getting this message.
I am not sure what's going on.
Best,