Calendar errors started June 3rd

For some reason, every time I open a day on my calendar and click on the Icon to View Games,  I suddenly get this error

TypeError: Error #1010: A term is undefined and has no properties.
   at mx.collections::GroupingCollection/buildGroups()
   at mx.collections::GroupingCollection/makeGroupedCollection()
   at mx.collections::GroupingCollection/refresh()
   at org.scheduler.view.components::Calendar/set umpireGames()
   at org.scheduler.view::CalendarMediator/handleNotification()
   at Function/http://adobe.com/AS3/2006/builtin::apply()
   at org.puremvc.patterns.observer::Observer/notifyObserver()
   at org.puremvc.core.view::View/notifyObservers()
   at org.puremvc.patterns.facade::Facade/notifyObservers()
   at org.puremvc.patterns.observer::Notifier/sendNotification()

It won't let me view any games on any days.  It's been working fine for the past month.  This suddenly started on June 3rd.

At the same time that the other errors showed up, I can no longer sign up for games.  I notice a Senior Wood bat game Friday at 5:30 at Whitman.  There are no umpires on the game but it will not allow me to sign up.  The sign up icon doesn't appear.

Mark Brown signed me up for that game using admin privs.  Now it appears I can sign up for some games so maybe that got fixed?  But the calendar error is still preventing me from using the calendar.  I notice that we are not allowed to sign up for tournament games if those tournament games don't involve our particular leagues.  I know that is policy for the regular season but for wood bat and all-stars, I thought we were going to take all comers?