Adobe Connect will no longer load

Yesterday I was supposed to deliver two webinars via Adobe Connect. The first one was in the morning and it went fine. The second was in the evening and I was unable to load Adobe Connect on my laptop - it launched the app and the blue bar extended right across the screen (whatever that's supposed to indicate!), but then it stopped and didn't open. I tried uninstalling and reinstalling but same thing happened. I had to cancel the webinar in the end and felt like a fool. My company will certainly be using a different webinar app in future but out of interest I'd like to know if anyone can suggest why Connect failed the second time.