Hawthorn: Batch enrollment error

Right now, i am using Hawthorn version
I can not use batch ernrollment,
every time i put an email address, i always get error message,

Does anyone know how to solve this problem?

Thanks in advance

To help we need more information from the log files.
you can follow them with this command:

sudo tail -f /edx/var/log/{lms,cms}/*log

then reproduce the error and tell us what you see there in log files.

Thanks, i solved the problem, it is because the email, i used gmail for smtp client, and gmail blocked the request from open edx, so the error appeared, i just turn off gmail blocked, and its run properly again