Create multiple new student accounts

Hello,

Please note special characters are not permitted for usernames or passwords, for example á,é, í, ó, ú, ñ, ë, ü, etc. Once you have made the corrections feel free to try again.

I am not able to add new group of student in live worksheet even after creating their correct username and password...help me to solve this issue

i didnot use any special characters except _Hyphen and - dash sign and ofcourse usend upper case an dlower case letter