Unable to Accept Invitation because of some codes

Hello!
Under the academic partnership program, I have tried to add/invite more students to join our Trados team, but they received the request to go through the authentification process. There they are requested to scan a non-scannable QR code, and we don't know where to find the 6-digit authentification code either: Enter your one-time code (???)
Thus, please help us. Thank you!
Best regards,
Olena Yasynetska
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