Ula
I have deactivated all the plug-ins. At no time did the screen take me to Error 404 Not Found.
I re-activated only the calendar plug-in and had the same crash issue.
I have also re-activated the other plug-ins.
I changed the Theme to Twenty Eleven and had the same crash issue. I returned it to the Ezekiel Theme by Church Themer that we are currently using.
I will leave the calendar deactivated for you to view and see how it appears.
Awaiting your response. Thank you! Gail