Hey Jeff,
Thanks for reaching out to us!
I took a look at your site and it appears that there is a javascript error generated when switching months (was also able to replicate in the other views when trying to click through multiple months or loading directly onto a different view).
The error given is a 500 Internal Server Error when requesting the admin-ajax file used for process the request.
As a starting point here, have you tried following the Testing for Conflicts procedures to see if there is another plugin that could be causing a conflict here with general requests to admin-ajax?
Let me know if you find any conflict and that can help get us pointed in the right direction here.
Thanks!