Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/elaaorg/public_html/wp-content/plugins/events-calendar-pro/vendor/rlanvin/php-rrule/tests/RfcParserTest.php:8 Stack trace: #0 {main} thrown in /home/elaaorg/public_html/wp-content/plugins/events-calendar-pro/vendor/rlanvin/php-rrule/tests/RfcParserTest.php on line 8