Hi,
More a MapServer/REST based operation question, but it's related to MCS.
I've created a service with MaritimeChartService enabled, it works fine. I can see all the layers.

Works good, no problems there. I want to isolate the Data Quality layer. I'm building a web app using this specific layer, is important that the end user can't see the other layers in the drop down menu (like pic above).
I can do that by adding "identify/8" to the URL, so it's .... MapServer/exts/MaritimeChartService/MapServer/identify/8".
If I load this URL in Pro it works, it isolates Data Quality.

However, my problem is when I load this into my Enterprise portal (Content > New Item > URL). I get an error message, no further error info.

How can I use this layer, and only this layer, from this service? It is for use in a web app, a separate layer that users will switch on/off to display navigational data quality boundaries.
FYI - I have figured out a way to do this, but it's inefficient. By creating a tile package layer (using MCSTPK), and only selecting the Data Quality layer. However using the Map Image Layer, is much easier/quicker to manage than dealing with tile packages.
Thanks
Jeremy