trouble sign in

To successfully sign in, you need to accept the invitation from your instructor by clicking the Accept invitation link, then follow the on-screen prompts to proceed. But regarding the error you've received about the voucher, I suggest connecting with your instructor directly to inform them that you are unable to sign in.

Once you contact your instructor, they can reset your student profile in their Educator Portal and send you a fresh link or a new invitation to help you get logged in successfully.

Feel free to reply here if you have additional questions.