I don't remember there being anything to expand (though my screenshot seems to say differently). However, when I went back to get the error again I got a much more descriptive response, see the new attachment for details. This seems to be a much more fixable problem:
"Fatal error: Call to a member function FormAction() on a non-object in /home/silverstripe/www/sapphire/forms/FormField.php on line 98 "
Note that I used to have my calender object at the top level and I now have it as a subclass, not sure if that's related though.

I have added these modules to a clean ss installation but I am having the same problems as others. I have installed all required modules and have the site in dev mode.

For linking tickets to dates etc your usage instructions say "To make a ticket available for a date/time, go to the "Tickets tab and click the "Search" tab. A search dialog will pop up, listing the tickets you defined earlier."

This search tab does not exist. How do I correct this?

There is no search link of any sort on the tickets tab.