I am attempting to deploy a Web AppBuilder 2.15 app to a production server using the latest proxy from Releases · Esri/resource-proxy · GitHub .
I get the following error (the item ID is for the web map) when I load the app:
However, when I browse directly to that URL outside of the app, I get no errors and the JSON description of the web map looks correct to me. Browsing to the item without the proxy gives me a 403 error, so proxy.config seems to be configured correctly.
What does "Status: 0" mean?
The proxy is good. I'm using it successfully for other WAB apps. The main difference is that those apps were created in WAB 2.8 and this new app is created in WAB 2.15. Is there a change to how apps are deployed that I'm not aware of?
Thanks for any help you can give troubleshooting this.