Hi there,
Thanks for emailing support and sorry you are having issues.
Sounds like there is a conflict.
Would you be willing to share your system information? That will allow me to check for possible conflicts and see your current calendar settings. You can snag that by heading to Events > Help, copying the information that is at the bottom of the screen, then paste it here for me as a private reply.
Also, are you able to share the URL?
To get you started on troubleshooting: First, please make sure you are using the most current versions of all of our plugins. You can also try reinstalling them by following these instructions. If that doesn’t help, the next step in troubleshooting this is going to be testing for conflicts with your theme and other plugins (with WP_DEBUG enabled). If you need a testing environment, the free WP Staging plugin will let you create a quick copy of your live site that you can use for testing.
Let me know what you find.
Thanks,
Brendan