I've Already Posted a Ticket for this...but including the fix here as well in case anyone else needs it.
When the event plug in is on an article that links to repeating events it's not taking you to the registration form. Because there is a typo in plg_dtregister.php.
The plug In Calls the below URL
?eventId=XX&task=register&conroller=event
If you spell controller correctly in plg_dtregister.php, this will fix the bug.
Already corrected and tested on my Dev site.
To fix this yourself:
Open plg_dtregister.php located at site/plugins/content/
Search for conroller and replace it with controller. There are two instances of this.