Version 5.x has been out of support since December 13, 2022, and this corresponding section of the documentation is no longer maintained. We strongly recommend you upgrade to the latest supported version of 7.x and read the latest version of this documentation.
Some optional features rely on ASP.NET Core distributed caching:
In order to work in a multi server environment, this needs to be set up correctly. Please consult the Microsoft documentation for more details.