When you're unable to access Punchh University and have a role assigned with the Access Dashboard Knowledgebase Permission enabled, this indicates Puchh University needs to be enabled internally by Punchh.
You'll know if you have access to Punchh University because you'll see a graduation hat on the top right of the Platform.
If the graduation hat is missing and the above criteria are met you'll want to submit a ticket to Support to get Punchh University enabled.