Sorry for the late reply -
This happens when the account you are logged into doesn’t have an active seat assigned to it. You can click preview/publish and the progress bar will appear but the zapcode will not. We are looking at ways to show an error message to hopefully make it a lot clearer.
@MrPropre sometimes the log-in and progress bar modal show up below the Studio window itself, could be the issue you are experiencing?
@TK422, I have replied to your support request directly, but for others that might be having the similar problems - the “Unable to connect” error can appear either when there is no stable internet connection, or if an experience has never been published to that specific project. I’d recommend double-checking that the project that relates to the trigger has an experience published to it.
Hope this helps.