Hi Steven
So sorry about the conflict. The Events Calendar 4.5.12.3 is now available, which resolves an issue related to the display of events in the default Month View. This issue (https://core.trac.wordpress.org/changeset/41496) was introduced with WordPress version 4.8.2 and impacts all previous versions of The Events Calendar–all users are encouraged to update as soon as possible. No other changes were made to any other areas of the plugin, and we apologize to anyone who might have been affected by this issue.
https://theeventscalendar.com/hotfix-the-events-calendar-4-5-12-3/.
We’ve since released a routine maintenance and feature release. Anything above 4.5.12.2 will work. It is worth noting that because WordPress viewed this as a serious security issue, they retroactively applied their code changes many versions of WordPress back before 4.8.2. As such, your host may have applied that correction already, leading to the conflicts still happening.
Please update and let us know if this resolves your issues.
Thanks
Courtney ?