I’m having the same issue. Both The Events Calendar and The Events Calendar Pro are Version 4.1.1 but I’m still getting the same error.
“The following plugins are out of date: Events Calendar PRO 3.11.1. All add-ons contain dependencies on The Events Calendar and will not function properly unless paired with the right version. Learn More.”
How can I get rid of this message? Re-installing the plugin isn’t really an option. The events calendar is on a live website.