Enrollment keys are highly case-sensitive. "English101" is completely different from "english101".
To help me give you the right advice for your situation, please let me know: class id and enrollment key for turnitin
If you are a student or instructor trying to set this up right now, I can help you: Enrollment keys are highly case-sensitive
: A case-sensitive alphanumeric "password" chosen by the instructor during class setup to prevent unauthorized users from joining. How to Obtain Them : You must obtain these credentials directly from your instructor class id and enrollment key for turnitin
: Click the green Add Class button located on your instructor homepage.