As many of you may have noticed, Orion NPM 8.5 introduced asp.net to the Orion Web console. Before v9.5, the web console was a mix of asp and asp.net, which means we still supported the older asp-based custom resources. We moved to ASP.NET in order to take advantage of new features unavailable in ASP. As of v9.5, we no longer support older asp-based custom resources.
What does this mean for you? If you don't have any custom resources, it doesn't mean anything. Don't worry about it. If you have created or have borrowed a custom resource, it will need to be re-written for asp.net compatibility in order to work with v9.5.