WMS symbology not appearing in Legend

[deleted-user-bWhhezP4R-ec]

My organization is trying to make a Web Map using a WMS in Portal 10.6. The symbology of the layers in the WMS are appearing on the map fine, however these symbols are not appearing in the Contents panel.

Here is the symbology on the map: 

Here is the Contents panel for Camera:

As you can see, the camera symbol does not appear below the Camera layer in the Contents panel. 

We would like that symbology to appear in the Contents Panel so that users can easily know what they are looking at on the map. Is there an easy way to do this in Portal, using a WMS?

[Lake_Worth_BeachAdmin]

try clearing your browser cache.

also are the symbols appearing on the map legend?

[deleted-user-bWhhezP4R-ec]

I tried clearing the cache. That did not work. They are not in the legend.

[JonathanQuinn]

Is this service publicly accessible? If so, can you provide the URL? I imagine there's a request for the legend that possibly isn't completing.

[deleted-user-bWhhezP4R-ec]

The service is public. Here is the URL: https://gis.511ny.org/geoserver/gwc/service/wms 

[Lake_Worth_BeachAdmin]

I am not able to view this layer

[deleted-user-bWhhezP4R-ec]

Hi Joe,

Do you mean that you can't add the WMS at all, or can you add it but you don't see anything? If it's the second, then when you add the WMS, press get layers, and then only add "Cameras". I don't know why it gives 400 errors when all the layers are added.

[deleted-user-bWhhezP4R-ec · Accepted solution]

I came up with a solution to this. We were using this map in a Web AppBuilder App. So I ended up modifying the LayerList Widget in Web AppBuilder so that it would query the WMS directly for the legend image and then display it in the LayerList. In order to display text next to those Legend pictures, I made a form on the Settings page that allows you to enter in text, which will appear in the Legend. I posted the widget in the original post.