Problem with Adobe Connect recordings not opening/not opening reliably.

The recording launches for me and plays back without issue. I'd try uninstalling the Connect App and then downloading and reinstalling the App from here to get the latest version.

https://helpx.adobe.com/adobe-connect/connect-downloads-updates.html#Application

Alternatively, you can tell Connect to not use the App by adding ?proto=false&html-view=true to the end of the url for the recording. That would launch the recording in your browser, which may also be a viable solution.

Any chance you can share an error or a screen shot of where it's getting stuck?