I,m installing WAB and I have a problem. I have not portal for arcgis and I have developer account. I did these steps:
1- I install node.js
2- I run startup.bat
3- I see a page in my browser that neet to put: specify the URL to your ArcGIS Online organization or portal for ArcGIS
4- I have arcgis developer account and I put my arcgis online address but I have this error:
Invalid redirect_uri
Error: 400
why?