Post a screenshot of the view you're trying to edit along with browser version numbers, please.
Issue fixed now. Installed firefox version 49 and can access the page
I do have the same issue that I can't edit views. Most of the time I do click the pencil button to edit the view I do get a grey browser windows and nothing is happening anymore.
I can click the "esc" button to get back to the list but then the web client is bugged that it doesn't load any other pages anymore, the flyout menues are not working anymore and other stuff like this.
Then I've tested to create a new view and there I can see the "popup windows" to edit the new view. This window is working until I try to add some metrics to it. There it start to bug that I can't change the window size and buttons aren't working anymore.
I've tested this with Chrome, Firefox, IE and Edge on several systems. Restarted the appliance and even did an update to the latest version. Nothing helped so far.
vROps is running at version 126.96.36.19963041 right now.