"Very well done"
— Justin Tadlock What They Say

Why am I seeing an error with RSet.php on the events calendar?

Please refer to Time to Upgrade to PHP 8.1 or Newer for a solution if you see an error similar to below.

There has been a critical error on this website.

Fatal error: Uncaught TypeError: Return value of RRule\RRule::current() must be an instance of RRule\mixed, instance of DateTime returned