Since PHP8 we have upgraded the CAS client to 1.6.0 and a new setting is needed called service_base_url.
This is the documentation for that:
* - A base URL string. The service URL discovery will always use this (protocol,
* hostname and optional port number) without using any external host names.
* - An array of base URL strings. The service URL discovery will check against
* this list before using the auto discovered base URL. If there is no match,
* the first base URL in the array will be used as the default. This option is
* helpful if your PHP website is accessible through multiple domains without a
* canonical name, or through both HTTP and HTTPS.
I presume this needs to be set to either an empty array, or the URL of your service discovery.
@natasha can we add this to the docs once we know what it should be?