Syncing Event Calendar ( w/ option to show month, week, day)?

I absolutely need to have an Events Calendar (One that has an option to show a month by month, week by week, and day views) that people can sync with their Calendars and have the “Add to my Google Calendar” button. I found and installed a plugin called Events Manager, but it is giving me an error code when I click on the event on the site? Here’s the link for the Plugin in case you would like to refer to it: So I deactivated the Events Manager for now. I’m not sure if this plugin can do everything I am needing either.

The site is currently at I may have it at tomorrow.