Unable to join meetings at Adobe Connect?

I need to join some online meetings being held over Adobe Connect.

After signing in, the meeting loading page opens and the progress bar goes from 0 to 100% with the message as connecting...

However the meeting never connects and eventually, I get the error message:

"The Meeting Room could not connect to the Adobe Connect Server. Please re-launch the Meeting Room, or refresh your browser to restore the connection."

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On troubleshooting, I found that am missing the Adobe Connect add-in. But I am unable to get how I resolve this?

I don't use Adobe connect, but here is what I did. I downloaded Adobe connect add-in 8, and I installed on Ubuntu 13.04. I just press Ctrl+Alt+T on the keyboard to open Terminal. When it opened, I navigated to where the file was downloaded, in my case it was the Downloads folder, and I ran the following command:

sudo dpkg -i *.deb

Screenshot of the installation window:

Make sure that you have flash installed and setup on the machine prior to installing the add-in. Hope that helps.

On the page with the error message, there will be a link to a troubleshooting page. Run the diagnostic tests, then click the button to "Send Results." This will send the information to the system administrator or help desk for the Adobe Connect server. For good measure, you might also contact them with a separate message.

(I don't know that this will really help, but it's what I did today, and currrently I'm waiting for the system administrators to respond. I'm using Ubuntu 14.04. I found the connection test failed on my university's Adobe Connect server, but it succeeded on Adobe's test page https://arcps.adobeconnect.com/common/help/en/support/meeting_test.htm, so I'm hoping the failure was due to some misconfiguration.)

Update: my university's server administrator found this trouble is due to an unresolved bug in Adobe's Flash player; see https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/1064353. I had been using Firefox; he advised me to use the 3rd workaround in the bug report: use Google Chrome on Linux, with its Pepper flash player. I had previously installed the Ubuntu chromium-browser package, and now I installed the Ubuntu package pepperflashplugin-nonfree, which provides this plugin for Chromium. Using Chromium browser, I am now able to connect to Connect server. Since Google now provides a deb package for Chrome, that would probably also work.

Adobe Connect does not currently support any Ubuntu version except Ubuntu 10.04 as stated in the Adobe Connect Page. You may choose to wait for the Adobe Connect 9.1 Add In to launch or you may use VirtualBox to install a copy of Ubuntu 10.04 (I think you don't want to use a release that old) and install the Adobe Connect 8 Add In which is available on the Adobe Connect Download Page.