So, i made a custom widget and added it into Portal as a Web App Builder Extension by using the manifest.json URL. It seems to be a successful deploy, as it even shows up in my Web App Builder, in the custom widget tab, but upon clicking "OK" after selecting my custom widget, nothing happens. Nothing.
I can add normal pre-built widgets just fine, it's just my widget that won't work.
Solved! Go to Solution.
Yes, now that you've mentioned it. It's a warning about CORS, saying the header isn't present, and another log message that reads: "No widget is selected. Unable to load https://portalURLhere.com/WidgetFolder/manifest.json"
That sounds like you have not registered the widget with the proper path. It should not be looking for the widgets manifest.json in the root of the portal url.
That was just a generic url i typed in, the widget file is properly mapped inside the server, as i can browse its contents externally via URL. I have edited my previous response as to avoid confusion.