Page-Includeis explicitly protected withserver.middleware.include, meaning it is designed to execute as aremote include, not as a shopper ' s top-level browser request. Salesforce ' s SFRA Page controller documentation describesPage-Includeas an endpoint triggered when content assets are embedded within a rendered page and identifiesserver.middleware.includeas its middleware.

The appropriate ISML mechanism is therefore:

< isinclude url= " ${URLUtils.url( ' Page-Include ' , ' cid ' , ' about-us ' )} " >

Using theurlattribute makes < isinclude > perform a remote include. Salesforce documents that this causes the web adapter to execute another request and insert the endpoint ' s returned content into the surrounding template.

Option A creates a shopper-clickable top-level URL, which fails the include middleware condition and explains the error described in the scenario. Option C is not the remote-include tag.

Study Guide reference:Application Development —Page-Include,server.middleware.include, remote includes, < isinclude url > , and SFRA content rendering.

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