In WebInspect dashboard console, we are not able to expand “Session Info” option and thus not able to view vulnerabilities details. Please help to fix this issue.
In order for that panel to be "activated" click on an item in the Tree View or in the Summary pane. From the screenshot it appears your Summary pane has been minimized. You can click on the border and drag it up to expand that pane. Here is a short video clip demonstrating what I'm referring to: https://www.screencast.com/t/fPvRVbMEjnNw