Failed opening event-node-month.tpl.php

I upgraded from the previous 6.x to the current 6.x-2.x-dev and am now receiving this error that states the event-node-month.tpl.php cannot be opened.

The upcoming events block displays correctly. However, the calendar (www.example.com/event) is not populated with the events.

When I upgraded, I followed all of the recommended procedures (offline mode, delete /event/, disable modules, update.php, etc).

Any thoughts on what to do?

warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include(./sites/all/modules/event/event-node-month.tpl.php) [function.include]: failed to open stream: No such file or directory in /mnt/vol/swim/example.com/includes/theme.inc on line 963.
warning: include() [function.include]: Failed opening './sites/all/modules/event/event-node-month.tpl.php' for inclusion (include_path='.:/usr/local/php5/lib/php:/usr/local/lib/php') in /mnt/vol/swim/example.com/includes/theme.inc on line 963.