In my case, i already have a normal account and i just modify my mail to my university’s mail.
The new mail was approved for student discount. However, i got this notification too
Cannot use Promo Code: Promotion only available to students
This seems like a sensitive account issue, and we’re here to help. It is likely we’ll need to investigate and discuss your private account details. Could you please contact our Customer Support Team at Webflow Support?
One of our Customer Support Team Specialists will be able to investigate and respond via email! Thank you so much!