The Blue Castle system could be busy which could be why you are unable to log in. The system retries every thirty seconds so please try again and remain logged on until you get through.
If you are on a wireless connection to the university’s network please check that you are on UoN Secure rather than UoN Guest network.
Please note if there are significant issues, there will be a notice on the IT Status Page. If you still don’t get through, or you’ve been trying for a while, please contact Digital and Technical Services by either phone: +44 (0)115 95 16677 (Monday to Friday, 8am to 5pm), or logging the issue using the Self-Service Portal.