Error storing dHCP user

Hello, I kept trying to make a new user registration in dHCP site, but it didn’t work.
It said to me that “Error Storing User”.
I will give you registration information about me,
then could you help me to register the account?
It is follows as:

USERNAME: chaehyun3253

FIRST NAME: Chae Hyeon
STUDY SITE OR LAB: CAMIN/Department of Data Science/Inha University
PHONE: +82-10-4109-9712

COMMENTS: I will get t1- and t2-weighted imaging data and predict t2 image from t1 image using Deep Learning prediction model.

Thank you for reading my message.