I have a Calendar Event Booking Component, that when I activated the Joomla SEF, it doesn't open the event details. The website is live, but is without Joomla SEF activated, and without SEF the event works.
Events Booking works very well with SEF enabled. Maybe there is something special on your site causing the error
Please submit a support ticket sending us super admin account of your site (and if it's possible, FTP account). We will check to see why it doesn't work and get it sorted for you