I have several queues placed in the OTRS. So i want to fetch emails and create tickets in multiple queues. So i have selected the option "Dispatching by email TO: Field" But when i click fetch emails, I'm getting the following error on the log, and nothing got fetched.

I'm Confused about why I'm getting this. I have added ACL's to the priority and i have marked certain fields as mandatory. Can any one help me to distinguish this issue?
Regards,
Hasitha