Thanks Nico.
I followed the instructions for changing to the 2016 theme and disabling plug-ins. I did this on a clone of our live site (fols.staging.wpengine.com) and the Events Calendar plug-in worked correctly. When I switched back to our theme (Evolution) the Events page demonstrates the broken behavior as you can see here: http://fols.staging.wpengine.com/events
Do you have some tips for how to isolate why our theme is breaking the Events Calendar?
Thanks,
John