Fatal error: Uncaught Error: Class "RRule\RSet" not found in /home/dennis91/public_html/wp-content/plugins/events-calendar-pro/src/Events_Pro/Custom_Tables/V1/RRule/RSet_Wrapper.php:29
Stack trace:
#0 {main}
thrown in /home/dennis91/public_html/wp-content/plugins/events-calendar-pro/src/Events_Pro/Custom_Tables/V1/RRule/RSet_Wrapper.php on line 29