I recently updated joomla, gantry framework, hydrogen and jevents and now I am getting the following errors when accessing my calendar from the menu item "Events Calendar"

0 Invalid controller: name='month', format=''

I also get the following error when I access an event from the latest event module on the home page

0 Invalid controller: name='icalrepeat', format=''

All other extensions and modules are loading and working fine.

Please advise