Software support for ILLiad 9.1 ended on 1 September 2024. OCLC-hosted institutions still on version 9.1 should contact OCLC Support and request an upgrade. Self-hosted institutions can find ILLiad 9.2 on the Atlas download page. For download credentials, contact OCLC Support.
Here is the Atlas article for 9.1.x end of support, as well as the ILLiad Release Schedule.