I am trying to troubleshoot Triggers and the pipelined process using the help at How to use Experience Cloud Triggers with Adobe Campaign Classic
It talks about a "pipelined status page" (No triggers are retrieved > Step #4 Look for errors in the pipelined status page. trigger-discarted, trigger-failures should be zero.)
Can you tell me where I find this status page in the client UI?
After searching the documentation page you linked, I think the status page is this: http://INSTANCE/pipelined/status
INSTANCE should be replaced with the ip address from your instance and you should use port 7781.
See screenshot from the page: