Can't start rockpool

I am running Rockpool on my RPi. I have installed the software, and get Flotilla Rockpool as a programming option. I click it and get the blue screen in my browser, with the headings Inputs, Converters and Outputs. BUT I don’t see any Connect button, and the Dock is never found. I don’t get a Pick Your Dock message.
My browser is the standard Midori that came with Jessie. What am I doing wrong in the installation?

Midori is not supported and is almost certainly not going to play ball, I’m afraid. Try with Epiphany (which WAS the standard browser in Jessie until recently), or better, Chromium, which is now the default browser for Raspbian.