If you just created your webinar, it can take a few minutes for the server that's hosting the webinar to set-up.
If you see "Server Initializing" message right after creating your webinar, don't worry, this is normal. The setup process can take a few minutes as the server configures your selected settings. Simply wait about five minutes for the initialization to complete.
If you created your webinar ahead of time, the webinar room won't be immediately availabe either. Instead, it will begin initializing at some time before the start of the webinar. This time is called the Presenter Preparation time and it is found within the Edit settings in the webinar dashboard.
If your server takes longer than five minutes to initialize, try refreshing the page. If the webinar still is not initializing don't hesitate to contact support@bigmarker.com