Hi,
Check with your IT Admin at your university if you have been given entitlement to use this product.
You may have been added with a Federated ID for Single Sign-On, check this and if so make sure you are logging on with this rather than your Adobe ID.
Try signing out and signing back in.
If you are using CC 2019 or later applications refer to the following to resolve any issues with your licensing on the local machine https://helpx.adobe.com/download-install/kb/licensing-errors.html
If you are using CC 2018 or earlier applications try the following:
The opm.db file contains cached user login information and deleting this file is a useful troubleshooting step. Once deleted a fresh file will be automatically created when you launch Creative Cloud and log back in.
○ Close the Creative Cloud application.
○ Navigate to the OOBE folder.
Windows: [System drive]:\Users\[user name]\AppData\Local\Adobe\OOBE
Mac OS: /Users/[user name]/Library/Application Support/Adobe/OOBE folder
○ Delete the opm.db file.
○ Launch Creative Cloud.