"Access to this server is not granted to user"

Hello, some of my collegues in my formula student Team cannot access their dashboards. When trying to log in they get this failure message. They have found a support link to solve this issue, but there it is descirbed how an administrator would solve this issue. Since we cannot have admin responsibility ourselves, I need some help of a formula student EUW admin to help me resolve this. 

The support link they found is the following: 
https://support.plmgroup.eu/hc/en-us/articles/16147530160413-How-to-fix-3DExperience-error-Access-to-this-server-is-not-granted-to-user

Thank you very much in advance!

Edu 3DEXPERIENCE Sponsorship