Installing WAB Dev version 2.5, connecting to AGS Portal 10.4.1; intranet environment, so I can't provide screen shots. When I start WAB through the startup file, the browser redirects to '?action=setportalurl', the progress bar reaches about 80%, and then nothing happens. No errors in the browser console. WAB Dev is installed on the same server as our portal instance. I've followed both the ESRI install instructions and the "Tips and Observations" blog post by Rebecca Strauch, and I have the same portal URL issue in both cases.