Copy and paste following sample Hub Site URL ( or your arcgis hub site URL ) next to 'let's go' button, then click 'enter' key or 'let's go' button
1). Arcgis hub( Los Angeles, CA ):
https://data-lahub.opendata.arcgis.com
2). Arcgis hub( Los Angeles County, CA ):
https://egis-lacounty.hub.arcgis.com
3). Arcgis hub( Riverside County, CA ):
https://gisopendata-CountyofRiverside.opendata.arcgis.com
Advanced Hub Site
https://transparentgov.net/json2tree/esri/online2/hub.html
Simple Hub Site
https://transparentgov.net/json2tree/esri/online/hub.html
If you see this error, for example, San Bernadio County arcgis online open data hub,
https://open.sbcounty.gov/ , after you click let's go button, you will see this error.
![](https://transparentgov.net/data/img5/sb_01.png)
That means county arcgis hub site do not allow CORS, cross origin, you have to use following proxy to bypass county CORS restriction.
(proxy)Simple Hub Site "hub7"
https://transparentgov.net/json2tree/esri/online/hub7.html
4). San Bernadio County arcgis online open data hub
https://open.sbcounty.gov/search?collection=Dataset
use proxy hub7,
https://transparentgov.net/json2tree/esri/online/hub7.html?filter_by=&org=https%3A%2F%2Fopen.sbcounty.gov%2F&url=https%3A%2F%2Fopen.sbcounty.gov%2F
![](https://transparentgov.net/data/img5/sb_02.png)